A piston force variable working condition energy-saving hydrogen-rich gas compressor

Abstract

The utility model is a piston force variable working condition energy-saving hydrogen-rich gas compressor, which is mainly composed of a fuselage, a crankshaft, a connecting rod, a middle body, a crosshead, a connecting sleeve, an oil scraper, an intermediate filler, a cylinder filler, a cylinder, a piston, a stepless gas volume adjustment device, an oil station, a coupling, a main motor, an air intake filter, an air intake buffer, an exhaust buffer, a gas-liquid separator, a cooler, an Expo nitrogen filling device, and an oiler. The crankshaft is installed on the main bearing of the fuselage, the crank on the crankshaft is connected to the big end of the connecting rod with bolts, the small end of the connecting rod is connected to the crosshead through a crosshead pin, and the crosshead is installed in the slideway of the middle body. When the crankshaft rotates, it drives the connecting rod to make the crosshead do reciprocating linear motion in the slideway. The utility model has the advantages of simple and reasonable structure, can well realize continuous and stable operation under the working conditions of flow rate 11000Nm³ and exhaust pressure 2.6Mpa (G), and can realize the adjustment of exhaust volume within the range of 0~100% without energy loss.

Description

Technical Field

[0001] The utility model specifically relates to a piston force variable working condition energy-saving hydrogen-rich gas compressor, which adopts a stepless gas volume adjustment device to achieve exhaust volume adjustment within the range of 0-100%, and belongs to the technical field of reciprocating piston hydrogen-rich gas compressors. Background Art

[0002] Hydrogen-rich gas compressors are used in chemical industry recovery and upgrading technologies and continuous reforming unit recovery units. Such compressors require large piston force, multiple operating conditions, and the ability to achieve stepless adjustment of exhaust volume within the range of 0-100% without energy loss. Currently, such compressors are very rare in the domestic and foreign markets, and existing traditional compressors have many problems such as narrow air volume adjustment range and high energy consumption, resulting in low overall efficiency and increased cost of use. Therefore, a piston force variable operating condition energy-saving hydrogen-rich gas compressor is designed to overcome the above problems. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide a piston force variable working condition energy-saving hydrogen-rich gas compressor with a simple and reasonable structure, which can well achieve continuous and stable operation under the working conditions of a flow rate of 11000Nm³ and an exhaust pressure of 2.6Mpa (G), and can adjust the exhaust volume within the range of 0-100% without energy loss.

[0004] The utility model is realized through the following technical solutions: a piston force variable working condition energy-saving hydrogen-rich gas compressor, which is mainly composed of a fuselage, a crankshaft, a connecting rod, a middle body, a crosshead, a connecting sleeve, an oil scraper, an intermediate filler, a cylinder filler, a cylinder, a piston, a stepless gas volume adjustment device, an oil station, a coupling, a main motor, an air intake filter, an air intake buffer, an exhaust buffer, a gas-liquid separator, a cooler, an Expo nitrogen filling device, and an oiler. The crankshaft is installed on the main bearing of the fuselage, the crank on the crankshaft is connected to the big end of the connecting rod with bolts, the small end of the connecting rod is connected to the crosshead through a crosshead pin, and the crosshead is installed in the slideway of the middle body. When the crankshaft rotates, it drives the connecting rod to make the crosshead perform reciprocating linear motion in the slideway.

[0005] Preferably, the middle body is connected to the fuselage and the connecting sleeve respectively through studs and sealed with O-rings, the oil scraper and the intermediate filler are installed on the connecting sleeve, the oil scraper scrapes the lubricating oil on the piston rod to prevent the lubricating oil from being brought into the cylinder with the piston rod, the intermediate filler is arranged between the double chambers of the connecting sleeve, and is filled with nitrogen of appropriate pressure through the Expo nitrogen filling device, the cylinder is connected to one end of the connecting sleeve, the crankshaft side of the cylinder is equipped with a cylinder filler, the piston rod passes through the cylinder filler, the intermediate filler, the oil scraper and the crosshead, and the cylinder is equipped with a special intake valve of a stepless gas volume adjustment device. The actual compressed gas volume of each compression stroke is adjusted by controlling the intake valve, and the exhaust volume is steplessly adjusted within the range of 0-100% without energy loss.

[0006] As a preference: the oiler is installed on the fuselage cover plate near the oil pump side, and injects a proper amount of lubricating oil into the cylinder and cylinder packing by manually adjusting the control flow to improve the service life of the seal. The oiler is connected to the oil station.

[0007] Preferably, the hydrogen-rich gas passes through an air intake filter and an air intake buffer and enters the first-stage cylinder of the compressor for compression. A buffer is provided at the inlet and outlet of each cylinder. After the gas comes out of the exhaust buffer, it enters the cooler for cooling, then passes through a gas-liquid separator to separate out free moisture, and then enters the next-stage cylinder for compression, and finally is discharged from the third stage into the user pipeline network.

[0008] Preferably, the compressor body, main motor, stepless air volume regulating device, Expo nitrogen filling device, oiler and air intake buffer are arranged on the second-floor operating platform, and the matching exhaust buffer, cooler, separator and oil station are arranged on the first floor.

[0009] Preferably, there are 7 main bearings on the fuselage.

[0010] The beneficial effects of the utility model are as follows:

[0011] The piston force variable working condition energy-saving hydrogen-rich gas compressor designed by this utility model adopts a horizontal, four-row, three-stage symmetrical balanced motion mechanism with a comprehensive piston force of 550kN, and is equipped with a stepless gas volume adjustment device with a special air inlet valve. It can achieve exhaust volume adjustment from 0 to 100% without energy loss, meeting user needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the plane structure of the utility model.

[0013] Figure 2 yes Figure 1 KK cross-section diagram in . DETAILED DESCRIPTION

[0014] In order to enable those skilled in the art to more clearly understand the purpose, technical solutions and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments.

[0015] In the description of the present invention, it should be understood that the orientations or positional relationships indicated by terms such as "upper", "lower", "left", "right", "inside", "outside", "horizontal", and "vertical" are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or original referred to must have a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0016] The present invention will be described in detail below with reference to the accompanying drawings: Figure 1-2 As shown, a piston force variable working condition energy-saving hydrogen-rich compressor mainly consists of a fuselage 23, a crankshaft 22, a connecting rod 21, a middle body 20, a crosshead 19, a connecting sleeve 16, an oil scraper 18, an intermediate filler 17, a cylinder filler 15, a cylinder 12, a piston 14, a stepless gas volume adjustment device 13, an oil station 3, a coupling 9, a main motor 10, an air intake filter 4, an air intake buffer 8, an exhaust buffer 7, a gas-liquid separator 1, a cooler 5, an Expo nitrogen filling device 2, and an oiler 11. The crankshaft 22 is installed on the main bearing of the fuselage 23, and the crank on the crankshaft is connected to the big end of the connecting rod 21 with bolts. The small end of the connecting rod 21 is connected to the crosshead 19 through a crosshead pin. The crosshead 19 is installed in the slideway of the middle body 20. When the crankshaft rotates, it drives the connecting rod to make the crosshead perform reciprocating linear motion in the slideway.

[0017] The engine frame of this invention is a "U"-shaped, cast iron frame with densely reinforced ribs inside. A frame spacer and hydraulically tightened tie rods are used above each main bearing to enhance rigidity and prevent deformation. The crankshaft is a high-tensile-strength alloy steel forging. All main journals and crankshaft necks are precision-ground and polished. A single main bearing is located between each crankshaft, and two main bearings are located at the drive end to minimize deflection, stress, and bearing loads. The connecting rod is die-forged steel with a rifled bore and a bronze bushing in the small end hole. The connecting rod body and connecting rod cap are matched and marked to facilitate repeatable alignment. The crosshead is cast from ductile iron and consists of a perforated flange fastened to the piston rod and a necked stud that screws into the crosshead. A dedicated tension nut is hydraulically tightened. Adjustment shims are included on the crosshead to set the cylinder end clearance.

[0018] The middle body 20 is connected to the fuselage 23 and the connecting sleeve 16 respectively through studs and sealed with O-rings. The oil scraper 18 and the intermediate filler 17 are installed on the connecting sleeve 16. The oil scraper scrapes the lubricating oil on the piston rod to prevent the lubricating oil from being brought into the cylinder with the piston rod. The intermediate filler 17 is arranged between the double chambers of the connecting sleeve and is filled with nitrogen of appropriate pressure through the Expo nitrogen filling device 2. The cylinder 12 is connected to one end of the connecting sleeve 16, and a cylinder filler 15 is installed on the crankshaft side thereof. The piston rod passes through the cylinder filler 15, the intermediate filler 17, the oil scraper 18 and the crosshead 19. A special intake valve of the stepless gas volume adjustment device 13 is installed on the cylinder. The actual compressed gas volume of each compression stroke is adjusted by controlling the intake valve, and the exhaust volume is steplessly adjusted within the range of 0-100% without energy loss.

[0019] The center body of this utility model is cast from gray cast iron and mounted to the machine body with studs and sealed with O-rings. A mating screw facilitates on-site alignment. The oil scraper includes a scraper ring and a sealing ring. The scraper ring prevents oil from the machine body from drifting along the piston rod and entering the cylinder, while the sealing ring prevents process gas from entering the machine body. The coupling is a double-chamber D-shaped coupling cast from gray cast iron. A large sealing window allows easy inspection of the packing and maintenance. The cylinder is cast from ductile iron, employing an oil-free design, low-oil lubrication, and desalted water cooling. A flanged cylinder liner is installed within the cylinder. The cylinder liner is secured by the clamping force of the cylinder head and prevents rotation during machine operation. The piston comprises a piston body, piston rod, piston rings, and support rings. The piston body is made of cast aluminum and ductile iron, while the piston rod is forged from alloy steel and subjected to high-frequency hardening. The piston rings and support rings are notched and extruded from carbon fiber-filled polytetrafluoroethylene. The main motor is the power source for driving the compressor. It is explosion-proof. The main shaft is made of forged steel and has undergone stress relief and heat treatment. The flange bolts at the shaft extension end are hydraulically tightened to connect with the compressor flywheel and crankshaft.

[0020] The oiler 11 is installed on the fuselage cover plate near the oil pump side. By manually adjusting the flow rate, an appropriate amount of lubricating oil is injected into the cylinder and cylinder filler to increase the service life of the seal. The oiler 11 is connected to the oil station 3.

[0021] The hydrogen-rich gas passes through the air intake filter 4 and the air intake buffer 8 and enters the first-stage cylinder of the compressor for compression. A buffer 7 is provided at the inlet and outlet of each cylinder. After the gas comes out of the exhaust buffer 7, it enters the cooler 5 for cooling, and then passes through the gas-liquid separator 1 to precipitate free water, and then enters the next-stage cylinder for compression, and finally is discharged from the third stage into the user pipeline network.

[0022] The compressor body 23, main motor 10, stepless air volume adjustment device 13, Expo nitrogen filling device 2, oiler 11, and intake buffer 8 are arranged on the second-floor operating platform 24. The supporting exhaust buffer 7, cooler 5, separator 1, and oil station 3 are located on the first floor. The body has a total of seven main bearings.

[0023] The oiler in the utility model includes conventional technologies such as an electric motor, an oil injection pump, an oil tank, a liquid level gauge, valves and instruments to provide oil lubrication for the compressor cylinder and cylinder packing. The oil injection amount at each oil injection point can be manually adjusted to increase the service life of the piston ring and cylinder packing ring.

[0024] The operating platform is made of steel plates and steel beams and is set around the concrete foundation of the compressor. The compressor body, main motor, stepless air volume adjustment device, Expo nitrogen filling device, oiler and air intake buffer are arranged on the second-floor operating platform, and the supporting exhaust buffer, cooler, separator and oil station are set on the first floor.

[0025] The piston force variable working condition energy-saving hydrogen-rich gas compressor designed by this utility model adopts a horizontal, four-row, three-stage symmetrical balanced motion mechanism with a comprehensive piston force of 550kN, and is equipped with a stepless gas volume adjustment device with a special air inlet valve. It can achieve exhaust volume adjustment from 0 to 100% without energy loss, meeting user needs.

[0026] The specific embodiments described herein are merely illustrative of the principles and effects of this utility model and are not intended to limit this utility model. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, any equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical concepts disclosed in this utility model shall be covered by the claims of this utility model.

Claims

1. A piston force variable working condition energy-saving hydrogen-rich gas compressor, which mainly consists of a body (23), a crankshaft (22), a connecting rod (21), a middle body (20), a crosshead (19), a connecting sleeve (16), an oil scraper (18), an intermediate filler (17), a cylinder filler (15), a cylinder (12), a piston (14), a stepless gas volume adjustment device (13), an oil station (3), a coupling (9), a main motor (10), an air intake filter (4), an air intake buffer (8), an exhaust buffer (7), a gas-liquid separator (1), a cooler (5), an Expo nitrogen filling device (2), and an oil injector (11), and is characterized in that: The crankshaft (22) is mounted on the main bearing of the machine body (23). The crank on the crankshaft is connected to the big end of the connecting rod (21) by bolts. The small end of the connecting rod (21) is connected to the crosshead (19) through a crosshead pin. The crosshead (19) is mounted in a slideway of the middle body (20). When the crankshaft rotates, it drives the connecting rod, so that the crosshead performs reciprocating linear motion in the slideway.

2. The piston force variable working condition energy-saving hydrogen-rich gas compressor according to claim 1 is characterized in that: The middle body (20) is connected to the body (23) and the connecting tube (16) through studs and sealed with O-rings. The oil scraper (18) and the intermediate filler (17) are installed on the connecting tube (16). The oil scraper scrapes off the lubricating oil on the piston rod to prevent the lubricating oil from being brought into the cylinder along with the piston rod. The intermediate filler (17) is arranged between the double chambers of the connecting tube and is filled with nitrogen of suitable pressure through the Expo nitrogen filling device (2). The cylinder (12) is connected to one end of the connecting tube (16). The crankshaft side thereof is equipped with a cylinder filler (15). The piston rod passes through the cylinder filler (15), the intermediate filler (17), the oil scraper (18) and is connected to the crosshead (19). The cylinder is equipped with a special intake valve of the stepless gas volume adjustment device (13). The actual compressed gas volume of each compression stroke is adjusted by controlling the intake valve, so that the exhaust volume can be adjusted steplessly within the range of 0-100% without energy loss.

3. The piston force variable working condition energy-saving hydrogen-rich gas compressor according to claim 1 is characterized in that: The oil injector (11) is mounted on the body cover plate close to the oil pump side, and injects a proper amount of lubricating oil into the cylinder and the cylinder filler by manually adjusting the control flow rate, thereby increasing the service life of the sealing component. The oil injector (11) is connected to the oil station (3).

4. The piston force variable working condition energy-saving hydrogen-rich gas compressor according to claim 1 is characterized in that: The hydrogen-rich gas passes through an air intake filter (4) and an air intake buffer (8) and enters the first-stage cylinder of the compressor for compression. A buffer (7) is provided at the inlet and outlet of each cylinder. After the gas exits the exhaust buffer (7), it enters the cooler (5) for cooling, then passes through a gas-liquid separator (1) to separate free water, then enters the next-stage cylinder for compression, and finally is discharged from the third stage into the user pipeline network.

5. The piston force variable working condition energy-saving hydrogen-rich gas compressor according to claim 1 is characterized in that: The compressor body (23), the main motor (10), the stepless gas volume regulating device (13), the Expo nitrogen filling device (2), the oil injector (11) and the air intake buffer (8) are arranged on the second-floor operating platform (24), and the matching exhaust buffer (7), the cooler (5), the separator (1) and the oil station (3) are arranged on the first floor.

6. The piston force variable working condition energy-saving hydrogen-rich gas compressor according to claim 1 is characterized in that: There are 7 main bearings on the fuselage.

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