High-voltage high-power V-shaped reciprocating vacuum pump

Abstract

The invention discloses a high-voltage high-power V-shaped reciprocating vacuum pump which comprises a machine body, an air inlet and exhaust port, an input mechanism, a base and an oil observation window. The two V-shaped isolation cavities of the machine body are fixedly connected with two air cylinders through positioning bosses and a plurality of bolt assemblies, the upper portions of the two air cylinders are fixedly connected with two air cylinder covers through positioning bosses and a plurality of bolt assemblies, and the lower portions of the two air cylinders are provided with main packing sealing assemblies. An auxiliary packing sealing assembly and an oil scraping ring assembly are arranged on the lower portion of the machine body isolation cavity, the air cylinder and the air cylinder cover are provided with air valve assemblies, a slider-crank mechanism is arranged in the machine body, the output end of the input mechanism is fixedly connected with the slider-crank mechanism, and the air pipe is arranged on the machine body. The maintenance workload is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum pumps, and more specifically to a high-voltage and high-power V-type reciprocating vacuum pump. Background Art

[0002] As an updated pump type, high-voltage and high-power reciprocating vacuum pumps have the advantages of high efficiency and energy saving, investment saving, wide application range, intelligent control, high reliability, easy disassembly and maintenance, etc., which have promoted the technological progress of vacuum pumps. At present, the maximum power of reciprocating vacuum pumps produced by other domestic manufacturers with vacuum pump production capacity is below 200KW. The cylinder head components of traditional reciprocating vacuum pumps generally include: cylinder, cylinder head, stuffing box, piston assembly, air valve assembly, stuffing assembly, etc., wherein the stuffing box is fixed on the compartment, the cylinder is fixed on the stuffing box, the cylinder head is fixed on the cylinder, and the joint surfaces are sealed by flat sealing gaskets. The disadvantage is that the structure is relatively complex and there are many sealing surfaces, which increases safety hazards. At the same time, the axial distance is long, and the vibration increases when the pump is running. Traditional reciprocating vacuum pumps generally use belt drive, and the static electricity that may be generated during operation poses a great safety hazard in flammable and explosive environments.

[0003] In order to solve the above-mentioned deficiencies in the prior art, a high-voltage and high-power V-type reciprocating vacuum pump with fewer joint surfaces and shorter axial distance is provided. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a high-voltage and high-power V-type reciprocating vacuum pump to solve the problems existing in the above-mentioned background technology.

[0005] The present invention provides the following technical solutions: a high-voltage and high-power V-shaped reciprocating vacuum pump, which is directly driven by a high-voltage and high-power permanent magnet synchronous motor, comprises a fuselage, an inlet and outlet, an input mechanism, a base and an oil sight glass, wherein the fuselage is provided with an isolation cavity structure with a 90° V-shaped center symmetrical distribution, the inlet and outlet are fixedly arranged at the upper end of the V-shaped fuselage, the inlet and outlet are provided with two groups of flange plates, the input mechanism and the bottom end of the base are located in the same horizontal plane, the output end of the input mechanism is fixedly connected with a crank slider mechanism, the base is fixedly arranged at the bottom of the fuselage, the oil sight glass is provided with multiple groups, and is fixedly arranged at the front end of the fuselage, two cylinders are fixedly connected on the two V-shaped isolation cavities of the fuselage through positioning bosses and a plurality of bolt assemblies, two cylinder heads are fixedly connected on the upper parts of the two cylinders through positioning bosses and a plurality of bolt assemblies, a main packing seal assembly is arranged at the lower part of the two cylinders, a secondary packing seal assembly and an oil scraper ring assembly are arranged at the lower part of the isolation cavity, a valve assembly is installed on the cylinder and the cylinder head, and the crank slider mechanism is installed and fixed at the bottom of the inner end of the fuselage.

[0006] Preferably, the crank slider mechanism is provided with a crankshaft, the crankshaft is fixedly connected to two connecting rod assemblies, the two connecting rod assemblies are symmetrically distributed, and the connecting rod assemblies are matched to connect two groups of crosshead sliders and two groups of slideways.

[0007] Preferably, the input mechanism includes a diaphragm coupling and a high-voltage and high-power permanent magnet synchronous motor, and the output end of the diaphragm coupling is connected to the input end of the crank slider mechanism.

[0008] Preferably, a piston is installed in the cylinder, and the piston is connected to the crank slider mechanism via a piston rod, and the piston rod passes through the fuselage isolation cavity. A water inlet and a water outlet are respectively provided on both sides of the cylinder and the cylinder head, and the water inlet and the water outlet are installed in cooperation with the air valve assembly.

[0009] Preferably, the air valve assembly includes a cap nut, a valve-pressing screw, a valve-pressing cover, a valve cover and a valve seat.

[0010] Preferably, the main packing seal assembly comprises a packing cavity, a packing body, a packing gland, a plurality of retaining rings, a first sealing ring group, a first heat dissipation throttling ring and a first O-ring, the packing cavity is filled with the packing body, the first O-ring is installed on the outer wall and end face of the packing gland, and the auxiliary packing seal assembly comprises a second heat dissipation throttling ring, a second O-ring, a retaining ring, a second sealing ring group, an auxiliary packing gland, an auxiliary packing body and an oil scraper ring group.

[0011] Preferably, the base is fixedly arranged at the bottom of the fuselage, and a plurality of reinforcing ribs are fixedly welded around the base.

[0012] Preferably, the oil sight glass is arranged in a plurality of groups and is respectively fixedly arranged at the two ends of the middle part of the V-shaped fuselage and at the left and right ends of the crank slider mechanism.

[0013] The high-voltage and high-power V-type reciprocating vacuum pump proposed by the present invention has the following beneficial effects compared with the prior art: 1. The piston rod passes through the fuselage isolation cavity and is extended to extend into the cylinder head support, which completely eliminates the swing phenomenon that may be caused by the piston running in the cylinder; 2. The air inlet and air outlet are set on the machine body, and the air duct is set on the machine body, which reduces the installation height of the air inlet and air outlet. At the same time, when inspecting the cylinder parts, there is no need to remove the air duct, which reduces the maintenance intensity and workload; 3. A gas valve assembly is arranged outside the cylinder and cylinder head assembly, which is convenient for inspection and maintenance. The intake and exhaust of the gas valve on the cylinder head are in the axial direction, which improves the stability of the piston operation; 4. An oil inlet hole is provided on the side wall of the slideway, and the oil inlet hole is connected to an external oil supply pump. The lubricating oil is supplied through the shaft head gear oil pump and the external motor oil pump through the oil distributor, thereby ensuring sufficient lubrication of the slideway, reducing the wear of the slideway and the crosshead, and extending the service life; 5. The vacuum pump is directly driven by a high-voltage, high-power permanent magnet synchronous motor. This method has reliable operation, high transmission efficiency, and eliminates the safety hazards caused by static electricity generated by belt transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a left view of the overall structure of the present invention; Figure 3 It is a cross-sectional view of the overall structure of the present invention; Figure 4 A cross-sectional view of a slider crank mechanism of the present invention; Figure 5 is a cross-sectional view of a main packing seal assembly of the present invention; Figure 6 It is a cross-sectional view of the auxiliary packing seal assembly of the present invention.

[0015] The accompanying drawings are marked as follows: 1, fuselage; 2, air inlet and outlet; 201, flange plate; 3, input mechanism; 301, diaphragm coupling; 302, high-voltage and high-power permanent magnet synchronous motor; 4, base; 401, reinforcing rib; 5, oil sight glass; 6, crank slider mechanism; 601, crankshaft; 602, connecting rod assembly; 603, crosshead slider; 604, slideway; 7, cylinder; 701, air valve assembly; 702, piston; 703, piston rod; 704, water inlet; 705, water outlet; 8, main Packing seal assembly; 801, packing cavity; 802, packing body; 803, main packing gland; 804, multiple retaining rings; 805, first sealing ring group; 806, first heat dissipation throttling ring; 807, first O-ring; 9, auxiliary packing seal assembly; 901, second heat dissipation throttling ring; 902, second O-ring; 903, retaining ring; 904, second sealing ring group; 905, auxiliary packing gland; 906, auxiliary packing body; 907, oil scraper ring group; 10, cylinder head assembly. DETAILED DESCRIPTION

[0016] Reference Figure 1 to Figure 3As shown, a high-voltage and high-power V-shaped reciprocating vacuum pump is directly driven by a high-voltage and high-power permanent magnet synchronous motor, including a body 1, an inlet and outlet 2, an input mechanism 3, a base 4 and an oil sight glass 5. The body 1 is provided with a 90° V-shaped central symmetrical compartment structure, the inlet and outlet 2 is fixedly arranged at the upper end of the body 1, the inlet and outlet 2 is provided with two sets of flange plates 201, the input mechanism 3 and the bottom end of the base 4 are located in the same horizontal plane, the output end of the input mechanism 3 is fixedly connected with a crank slider mechanism 6, and the base 4 is fixedly arranged at the bottom of the fuselage 1, a plurality of reinforcing ribs 401 are fixedly welded around the base 4, a plurality of groups of oil sight glasses 5 are arranged and fixedly arranged on the fuselage 1, the input mechanism 3 comprises a diaphragm coupling 301 and a high-voltage and high-power permanent magnet synchronous motor 302, the output end of the diaphragm coupling 301 is connected to the input end of the crank slider mechanism 6, the input mechanism 3 adopts a high-voltage and high-power permanent magnet synchronous motor 302 to directly drive through the diaphragm coupling 301, and this mode is reliable in operation and has high transmission efficiency.

[0017] The two V-shaped isolation chambers on the fuselage 1 are fixedly connected with two cylinders 7 through positioning bosses and a number of bolt assemblies, the two cylinders 7 are fixedly connected with two cylinder heads 10 through positioning bosses and a number of bolt assemblies, a main packing seal assembly 8 is arranged at the lower part of the two cylinders, and a secondary packing seal assembly 9 is arranged at the lower part of the fuselage isolation chamber, and a gas valve assembly 701 is arranged in the cylinder 7. The piston rod 703 is always in a cyclic reciprocating motion, and the main packing seal assembly 8 is constantly rubbed, which will cause the packing seal assembly to wear for a long time, and the medium gas leakage in the cylinder will occur. By arranging the main and secondary packing seals to prevent the main packing seal assembly 8 from wearing, the secondary packing seal assembly 9 can timely prevent the medium gas from leaking into the body, thereby playing a double insurance role.

[0018] Reference Figure 3 and Figure 5 As shown, the crank slider mechanism 6 is installed and fixed at the bottom of the inner end of the fuselage 1, and the crank slider mechanism 6 is provided with a crankshaft 601. The crankshaft 601 is a single-crank structure, and the first-order reciprocating inertia force can be balanced by a balance block, and the vibration of the whole machine is small. The crankshaft 601 is fixedly connected to two connecting rod assemblies 602, and the two connecting rod assemblies 602 are symmetrically distributed. The connecting rod assembly 602 is matched with two groups of crosshead sliders 603 and two groups of slideways 604. The crosshead slider 603 is made of cast steel, and babbitt alloy is poured on the contact surface with the slideway, which improves the wear resistance of the slideway and extends the service life. The airway of the cylinder 7 and the cylinder head 10 is smooth, which reduces the exhaust resistance and increases the service life of the valve. The cooling water channel of the cylinder 7 and the cylinder head 10 has a large flow area, which reduces the exhaust temperature and increases the service life of the valve.

[0019] A piston 702 is installed in the cylinder 7, and the piston 702 is connected to the crank slider mechanism 6 via a piston rod 703. The piston 702 is made of cast aluminum alloy to reduce the reciprocating inertia force of the crank slider mechanism 6 during operation, improve the stability of equipment operation, and improve the life of the parts of the whole machine. The piston rod 703 is integrated, and the connection between the piston rod 703 and the crosshead slider 603 adopts a reliable stopper positioning and anti-loosening device to eliminate the hidden danger of damaging the cylinder head 10 due to the loosening of the piston rod 703 that may occur during operation. The connection between the piston rod 703 and the piston 702 adopts a splint structure to eliminate the loosening phenomenon that may be caused by nut locking. The upper end of the piston rod 703 is extended to extend into the cylinder head 10, and a floating support is provided on the cylinder head 10 as an auxiliary guide sleeve of the piston rod 703 to eliminate the swinging phenomenon that may be caused by the operation of the piston 702 in the cylinder 7.

[0020] The cylinder 7 and the cylinder head 10 are respectively provided with a water inlet 704 and a water outlet 705 on both sides, and the water inlet 704 and the water outlet 705 are installed in conjunction with the air valve assembly 701 to ensure a cooling effect; the cooling method of the cylinder 7 and the cylinder head 10 is water cooling, and the cooling water circuit is arranged on the outside of the cylinder 7 and the cylinder head 10 to ensure that no water enters the flow-through part. The air valve assembly 701 includes a cap nut 7011, a pressure valve screw 7012, a pressure valve cover 7013, and a valve cover 7014. 014 and valve seat 7015, the air valves are all arranged on the outside of the cylinder 7 and the cylinder head 10, which are convenient for inspection and maintenance. The intake and exhaust of the air valves on the cylinder head 10 are in the axial direction, which improves the stability of the operation of the piston 702. The air valve structure is arranged in an annular shape to increase the flow area, reduce the friction of the gas flowing through the air valve, and reduce the exhaust temperature. The oil sight glass 5 is arranged in multiple groups and is respectively fixed at the two ends of the middle part of the V-shaped fuselage 1 and the left and right ends of the crank slider mechanism 6.

[0021] Reference Figure 3 and Figure 5 As shown, the main packing seal assembly 8 includes a packing cavity 801, a packing body 802, a packing gland 803, a plurality of retaining rings 804, a first sealing ring group 805, a first heat dissipation throttling ring 806 and a first O-ring 807. The packing cavity 801 is filled with the packing body 802, and the first O-ring 807 is installed on the outer wall and end face of the packing gland 803.

[0022] Reference Figure 3 and Figure 6 As shown, the auxiliary packing sealing assembly 9 includes a second heat dissipation throttling ring 901, a second O-ring 902, a retaining ring 903, a second sealing ring group 904, an auxiliary packing gland 905, an auxiliary packing body 906 and an oil scraper ring group 907, and the oil scraper ring group is arranged with its cutting edge facing downward.

[0023] The working principle of the present invention is as follows: during operation, driven by the high-voltage and high-power permanent magnet synchronous motor 302, the crank slider mechanism 6 composed of the crankshaft 601, the connecting rod assembly 602, the crosshead slider 603, the slideway 604 assembly, etc., transmits the reciprocating linear motion of the crosshead slider 603 to the piston 702 through the piston rod 703, and the piston 702 performs reciprocating linear motion in the cylinder 7 to form the expansion and compression of the gas in the cylinder, and completes the suction and exhaust motion through the gas valve assembly 701, while the linear motion of the piston 702 is performed by the crank slider. The block mechanism 6 drives the piston rod 703 connected to the piston 702, and the piston rod 703 converts the rotational motion into reciprocating linear motion through the crosshead slider 603 to realize the suction process. During operation, the main packing seal assembly 8 and the auxiliary packing seal assembly 9 mainly prevent the lubricating oil from escaping to the isolation cavity on the fuselage 1 and prevent the possible leakage of medium gas from entering the crank slider mechanism 6. The oil scraper ring assembly 907 scrapes the lubricating oil attached to the piston rod 703 and flows it back to the crank slider mechanism 6 through the oil return hole to ensure that no lubricating oil enters the cylinder 7.

[0024] In the drawings of the embodiments disclosed in the present invention, only the structures related to the implementation rules of the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

Claims

1. A high-voltage, high-power V-type reciprocating vacuum pump, which is driven by a high-voltage, high-power permanent magnet synchronous motor directly connected to a diaphragm coupling, comprises a body (1), an air inlet and outlet (2), an input mechanism (3), a base (4) and an oil sight glass (5), and is characterized in that: The fuselage (1) is provided with a 90° V-shaped centrally symmetrically distributed isolation cavity structure, the air inlet and outlet (2) is fixedly arranged at the upper end of the V-shaped fuselage (1), the air inlet and outlet (2) is provided with two sets of flange plates (201), the input mechanism (3) and the bottom end of the base (4) are located in the same horizontal plane, the output end of the input mechanism (3) is fixedly connected to a crank slider mechanism (6), the base (4) is fixedly arranged at the bottom of the fuselage (1), the oil sight glass (5) is provided with a plurality of sets and is fixedly arranged on the fuselage (1), and the two V-shaped isolation cavities of the fuselage (1) are connected to each other. Two cylinders (7) are fixedly connected via positioning bosses and a plurality of bolt assemblies; two cylinder heads (10) are fixedly connected at the upper parts of the two cylinders (7) via positioning bosses and a plurality of bolt assemblies; a main packing seal assembly (8) is arranged at the lower part of the cylinder (7); a secondary packing seal assembly (9) is arranged at the lower part of the isolation chamber of the body (1); a gas valve assembly (701) is arranged outside the cylinder (7) and the cylinder head (10); the crank slider mechanism (6) is mounted and fixed to the bottom of the inner end of the body (1); and a piston (702) and a piston rod (703) are arranged at the upper end of the crank slider mechanism (6).

2. A high voltage and high power V-type reciprocating vacuum pump according to claim 1, characterized in that: The input mechanism (3) comprises a diaphragm coupling (301) and a high-voltage, high-power permanent magnet synchronous motor (302); the output end of the diaphragm coupling (301) is connected to the input end of the crank slider mechanism (6).

3. A high voltage and high power V-type reciprocating vacuum pump according to claim 1, characterized in that: The crank slider mechanism (6) is provided with a crankshaft (601), the crankshaft (601) being fixedly connected to two connecting rod assemblies (602), the two connecting rod assemblies (602) being symmetrically distributed, and the connecting rod assemblies (602) being matched to connect two groups of crosshead sliders (603) and two groups of slideways (604).

4. A high voltage and high power V-type reciprocating vacuum pump according to claim 1, characterized in that: A piston (702) is installed in the cylinder (7), and the piston (702) is connected to the crank slider mechanism (6) via a piston rod (703). The piston rod (703) passes through the isolation cavity on the body (1). A water inlet (704) and a water outlet (705) are respectively provided on both sides of the cylinder (7) and the cylinder head (10).

5. A high voltage and high power V-type reciprocating vacuum pump according to claim 1, characterized in that: The air valve assembly (701) comprises a cap nut (7011), a valve-pressing screw (7012), a valve-pressing cover (7013), a valve cover (7014) and a valve seat (7015).

6. A high voltage and high power V-type reciprocating vacuum pump according to claim 1, characterized in that: The main packing seal assembly (8) comprises a packing cavity (801), a packing body (802), a packing gland (803), a plurality of retaining rings (804), a first sealing ring group (805), a first heat dissipation throttling ring (806) and a first O-type sealing ring (807); the packing cavity (801) is filled with the packing body (802); the first O-type sealing ring (807) is installed on the outer wall and end face of the packing gland (803); the auxiliary packing seal assembly (9) comprises a second heat dissipation throttling ring (901), a second O-type sealing ring (902), a retaining ring (903), a second sealing ring group (904), an auxiliary packing gland (905), an auxiliary packing body (906) and an oil scraper ring group (907); the oil scraper ring group (907) is arranged with a cutting edge facing downward.

7. A high voltage and high power V-type reciprocating vacuum pump according to claim 1, characterized in that: The base (4) is fixedly arranged at the bottom of the fuselage (1), and a plurality of reinforcing ribs (401) are fixedly welded around the base (4).

8. A high voltage and high power V-type reciprocating vacuum pump according to claim 1, characterized in that: The oil sight glass (5) is provided in multiple groups and is respectively fixedly arranged at two ends of the middle part of the V-shaped fuselage (1) and at the left and right ends of the crank slider mechanism (6).

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