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

Abstract

The utility model discloses a high-voltage high-power V-shaped reciprocating vacuum pump which comprises a machine body, an air inlet / outlet, 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 utility model relates to a vacuum pump technical field more particularly to a kind of high-voltage high-power V type reciprocating vacuum pump. BACKGROUND

[0002] As a kind of updated pump type, high-voltage high-power reciprocating vacuum pump has the advantages of high efficiency, energy saving, investment saving, wide application range, intelligent control, high reliability, easy disassembly and maintenance, etc., which promotes the technical progress of vacuum pump. At present, the maximum power of the reciprocating vacuum pump produced by other domestic manufacturers with vacuum pump production capacity is below 200KW. The cylinder head components of traditional reciprocating vacuum pump generally include: cylinder, cylinder cover, packing box, piston assembly, valve assembly, packing assembly, etc. The packing box is fixed on the isolation cavity, the cylinder is fixed on the packing box, and the cylinder cover is fixed on the cylinder. The combination surface is sealed by plane gasket. The disadvantages are complex structure, more sealing surfaces, which increases the safety hazard, and the axial distance is longer, which increases the vibration during pump operation. The traditional reciprocating vacuum pump generally uses belt drive, which may generate static electricity during operation, which poses a great safety hazard in flammable and explosive environments.

[0003] In order to solve the above problems of the prior art, a high-voltage high-power V type reciprocating vacuum pump with fewer combination surfaces and shorter axial distance is provided. SUMMARY

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

[0005] The utility model provides the following technical scheme: a kind of high-voltage high-power V type reciprocating vacuum pump, using high-voltage high-power permanent magnet synchronous motor direct drive, including body, inlet and exhaust port, input mechanism, base and oil window, the body is set to 90 ° V type center symmetry distribution isolation cavity structure, the inlet and exhaust port are fixedly set in V type the upper end portion of the machine body, the inlet and exhaust port are provided with two groups of flange plate, the input mechanism and the base bottom end are located in the same horizontal plane, the input mechanism output end is fixedly connected with crank slider mechanism, the base is fixedly set in the bottom of the machine body, the oil window is provided with multiple groups, fixedly set in the front end of the machine body, the two cylinders are fixedly connected on the two V type isolation cavities of the machine body through positioning boss and a plurality of bolt assemblies, the two cylinder covers are fixedly connected on the upper parts of the two cylinders through positioning boss and a plurality of bolt assemblies, the main packing seal assembly is arranged on the lower parts of the two cylinders, the vice packing seal assembly and the oil scraping ring assembly are arranged on the lower parts of the isolation cavities, the valve assembly is installed on the cylinder and the cylinder cover, and the crank slider mechanism is installed and fixed in the inner end bottom of the machine body.

[0006] Preferably, the crank slider mechanism is provided with a crankshaft fixedly connected with two connecting rod assemblies, the two connecting rod assemblies are symmetrically distributed, and the connecting rod assemblies are connected with two sets of cross head sliders and two sets of sliding channels.

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

[0008] Preferably, a piston is arranged in the cylinder, the piston is connected with the crank slider mechanism through a piston rod, the piston rod passes through the machine body isolation cavity, water inlets and outlets are arranged on the two sides of the cylinder and the cylinder cover respectively, and the water inlets and the water outlets are arranged in cooperation with the valve assembly.

[0009] Preferably, the valve assembly comprises a cover 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 seal ring group, a first heat dissipation throttle ring and a first O-shaped sealing ring, the packing cavity is filled with the packing body, the first O-shaped sealing ring is arranged on the outer wall and the end face of the packing gland, and the auxiliary packing seal assembly comprises a second heat dissipation throttle ring, a second O-shaped sealing ring, a retaining ring, a second seal 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 machine body, and a plurality of reinforcing ribs are fixedly welded around the base.

[0012] Preferably, a plurality of groups of oil viewing windows are fixedly arranged at the two ends of the V-shaped machine body and the left and right ends of the crank slider mechanism.

[0013] Compared with the prior art, the high-voltage high-power V-shaped reciprocating vacuum pump has the following beneficial effects:

[0014] 1. The piston rod passes through the machine body isolation cavity and is lengthened to extend into the cylinder cover support, so that the swing phenomenon of the piston in the cylinder is completely eliminated;

[0015] 2. The air inlet and the air outlet are arranged on the machine body, and the air pipe is arranged on the machine body, so that the installation height of the air inlet and the air outlet is reduced, and when the cylinder components are overhauled, the air pipe does not need to be disassembled, the maintenance strength is reduced, and the maintenance workload is reduced;

[0016] 3. The valve assembly is arranged outside the cylinder and the cylinder cover assembly, so that the valve assembly is convenient to check and maintain, the air inlet and the air outlet of the valve on the cylinder cover are in the axial direction, and the stability of the piston operation is improved;

[0017] 4. The oil inlet hole is arranged in the slide side wall, the oil inlet hole is connected with the external oil pump, the lubricating oil is supplied through the shaft head gear oil pump and the external motor oil pump after the oil distributor, the full lubrication of the slide is ensured, the wear of the slide and the cross head is reduced, and the service life is prolonged.

[0018] 5. The vacuum pump is directly driven by the high-voltage high-power permanent magnet synchronous motor, the mode is reliable in operation, high in transmission efficiency, and eliminates the safety hidden danger caused by static electricity generated by the belt transmission. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the overall structure schematic view of the utility model;

[0020] Figure 2 It is the overall structure left view of the utility model;

[0021] Figure 3 It is the overall structure sectional view of the utility model;

[0022] Figure 4 It is the crank slider mechanism sectional view of the utility model;

[0023] Figure 5 It is the main packing seal assembly sectional view of the utility model;

[0024] Figure 6 It is the vice packing seal assembly sectional view of the utility model.

[0025] The figure mark is: 1, fuselage; 2, inlet and outlet; 201, flange plate; 3, input mechanism; 301, diaphragm coupling; 302, high-voltage high-power permanent magnet synchronous motor; 4, base; 401, reinforcing rib; 5, oil viewing window; 6, crank slider mechanism; 601, crankshaft; 602, connecting rod assembly; 603, cross head slider; 604, slide; 7, cylinder; 701, 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 seal ring group; 806, first heat dissipation throttle ring; 807, first O-shaped sealing ring; 9, vice packing seal assembly; 901, second heat dissipation throttle ring; 902, second O-shaped sealing ring; 903, retaining ring; 904, second seal ring group; 905, vice packing gland; 906, vice packing body; 907, oil scraper ring group; 10, cylinder cover assembly. DETAILED DESCRIPTION

[0026] Reference Figures 1-3As shown, a high-voltage large-power V-type reciprocating vacuum pump is directly driven by a high-voltage large-power permanent magnet synchronous motor, comprising a body 1, an inlet and exhaust port 2, an input mechanism 3, a base 4 and an oil window 5, the body 1 is provided with a 90° V-type central symmetrical cavity structure, the inlet and exhaust port 2 is fixedly arranged on the upper end of the body 1, the inlet and exhaust port 2 is provided with two groups of flange plates 201, the input mechanism 3 and the bottom end of the base 4 are located on the same horizontal plane, the output end of the input mechanism 3 is fixedly connected with a crank slider mechanism 6, the base 4 is fixedly arranged on the bottom of the body 1, a plurality of reinforcing ribs 401 are fixedly welded around the base 4, the oil window 5 is provided with a plurality of groups of fixedly arranged on the body 1, the input mechanism 3 comprises a diaphragm coupling 301 and a high-voltage large-power permanent magnet synchronous motor 302, the output end of the diaphragm coupling 301 is connected with the input end of the crank slider mechanism 6, the input mechanism 3 directly drives the diaphragm coupling 301 through the high-voltage large-power permanent magnet synchronous motor 302, which has reliable operation and high transmission efficiency.

[0027] The two V-type isolation cavities on the body 1 are fixedly connected with two cylinders 7 through positioning bosses and a plurality of bolt assemblies, the two cylinders 7 are fixedly connected with two cylinder covers 10 through positioning bosses and a plurality of bolt assemblies, the lower part of the two cylinders is provided with a main packing seal assembly 8, the lower part of the body isolation cavity is provided with a secondary packing seal assembly 9, the cylinder 7 is provided with a valve assembly 701, the piston rod 703 is always in a cyclic reciprocating motion, the main packing seal assembly 8 is continuously rubbed, and long-time rubbing will cause the packing seal assembly to wear, resulting in medium gas leakage in the cylinder, the setting of the main and secondary packing seals prevents the main packing seal assembly 8 from wearing and the secondary packing seal assembly 9 from timely preventing medium gas from leaking into the body, thereby playing a double insurance role.

[0028] Referring to Figure 3 and Figure 5 As shown, the crank slider mechanism 6 is fixedly installed at the inner bottom of the body 1, the crank slider mechanism 6 is provided with a crankshaft 601, the crankshaft 601 is a single-crank structure, a first-order reciprocating inertia force can be balanced by a balance block, the whole machine has small vibration, the crankshaft 601 is fixedly connected with two connecting rod assemblies 602, the two connecting rod assemblies 602 are symmetrically distributed, the connecting rod assembly 602 is connected with two groups of cross head sliders 603, two groups of slide ways 604, the cross head slider 603 is made of cast steel, and a babbitt alloy is poured on the contact surface with the slide way to improve the wear resistance of the slide way and prolong the service life, the air passages of the cylinder 7 and the cylinder cover 10 are smooth, the exhaust resistance is reduced, and the service life of the valve is improved, the cooling water passage of the cylinder 7 and the cylinder cover 10 has a large flow area, the exhaust temperature is reduced, and the service life of the valve is improved.

[0029] The piston 702 is installed in the cylinder 7, and the piston 702 is connected with the crank slider mechanism 6 through a piston rod 703. The piston 702 is made of cast aluminum alloy, which reduces the reciprocating inertia force of the crank slider mechanism 6 during operation, improves the stability of the equipment operation, prolongs the service life of the whole machine parts, and the piston rod 703 is integrated. The connection between the piston rod 703 and the cross head slider 603 adopts reliable stop positioning and anti-loose device, which eliminates the hidden danger of the cylinder cover 10 caused by the loosening of the piston rod 703 during operation. The connection between the piston rod 703 and the piston 702 adopts a clamping plate structure, which eliminates the loosening phenomenon caused by the use of nut locking. The upper end of the piston rod 703 is extended into the cylinder cover 10, and a floating support is arranged on the cylinder cover 10 as an auxiliary guide sleeve of the piston rod 703, which eliminates the swinging phenomenon of the piston 702 in the cylinder 7.

[0030] The cylinder 7 and the cylinder cover 10 are respectively provided with water inlets 704 and water outlets 705 on both sides. The water inlets 704 and the water outlets 705 are installed in cooperation with the valve assembly 701 to ensure the cooling effect. The cooling method of the cylinder 7 and the cylinder cover 10 is water cooling, and the cooling water channel is arranged on the outside of the cylinder 7 and the cylinder cover 10 to ensure that no water enters the overflow part. The valve assembly 701 includes a cover nut 7011, a valve pressing screw 7012, a valve pressing cover 7013, a valve cover 7014 and a valve seat 7015. The valves are all arranged on the outside of the cylinder 7 and the cylinder cover 10, which is convenient for inspection and maintenance. The inlet and outlet of the valve on the cylinder cover 10 are in the axial direction, which improves the stability of the piston 702 operation. The valve structure is arranged in a ring shape, which increases the flow area, reduces the gas friction of the valve, and reduces the exhaust temperature. The oil window 5 is provided with multiple groups and is fixedly arranged in the middle of the V-shaped body 1 at both ends and on the left and right of the crank slider mechanism 6.

[0031] Referring to Figure 3 and Figure 5 , 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 seal ring group 805, a first heat dissipation throttle ring 806 and a first O-shaped sealing ring 807. The packing cavity 801 is filled with the packing body 802, and the first O-shaped sealing ring 807 is installed on the outer wall and end face of the packing gland 803.

[0032] Referring to Figure 3 and Figure 6 , the auxiliary packing seal assembly 9 includes a second heat dissipation throttle ring 901, a second O-shaped sealing ring 902, a retaining ring 903, a second seal ring group 904, an auxiliary packing gland 905, an auxiliary packing body 906 and an oil scraper ring group 907. The cutting edge of the oil scraper ring group is arranged downward.

[0033] The working principle of the utility model is: when running, the crank slider mechanism 6 composed of the crankshaft 601, the connecting rod assembly 602, the crosshead slider 603 and the slide 604 assembly and the like under the drive of the high-voltage high-power permanent magnet synchronous motor 302, the reciprocating linear motion of the crosshead slider 603 is transmitted to the piston 702 through the piston rod 703, the piston 702 does the reciprocating linear motion in the cylinder 7 to form the expansion and compression of the cylinder gas, and the suction and exhaust motion is completed through the valve assembly 701, and the linear motion of the piston 702 is completed through the crank slider mechanism 6 driving the piston rod 703 connected to the piston 702, the piston rod 703 converts the rotary motion into the reciprocating linear motion through the crosshead slider 603, realizes the suction process, in the running process, the main packing seal assembly 8 and the auxiliary packing seal assembly 9 mainly prevent the lubricating oil from leaking to the isolation cavity of the machine body 1 and prevent the possible leakage medium gas from entering the crank slider mechanism 6, the oil scraper ring group 907 scrapes the lubricating oil attached to the piston rod 703 and flows back to the crank slider mechanism 6 through the oil return hole, and it is guaranteed that no lubricating oil enters the cylinder 7.

[0034] The utility model discloses the drawings in the embodiment, only relate to the structure related to the embodiment of the present disclosure, other structures can refer to the usual design, under the condition of not conflict, the same embodiment and different embodiments of the utility model can be combined with each other.

Claims

1. A high-voltage and high-power V-type reciprocating vacuum pump directly driven by a high-voltage and high-power permanent magnet synchronous motor, comprising a machine body (1), an air inlet and outlet (2), an input mechanism (3), a base (4) and an oil sight window (5), characterized in that: The fuselage (1) is provided with a 90° V-shaped central symmetrical distribution isolation chamber structure, the air inlet and outlet (2) is fixedly arranged on the upper end of the V-shaped fuselage (1), the air inlet and outlet (2) is provided with two groups of flange plates (201), the input mechanism (3) and the bottom end of the base (4) are located on the same horizontal plane, the input mechanism (3) is fixedly connected with the crank slider mechanism (6) at the output end, the base (4) is fixedly arranged on the bottom of the fuselage (1), the oil window (5) is provided with a plurality of groups, and is fixedly arranged on the fuselage (1), the two V-shaped isolation chambers of the fuselage (1) are fixedly connected with two cylinders (7) through positioning bosses and a plurality of bolt assemblies, the upper parts of the two cylinders (7) are fixedly connected with two cylinder covers (10) through positioning bosses and a plurality of bolt assemblies, the lower part of the cylinder (7) is provided with a main packing seal assembly (8), the lower part of the isolation chamber of the fuselage (1) is provided with a secondary packing seal assembly (9), the cylinder (7) and the cylinder cover (10) are provided with a gas valve assembly (701) outside, the crank slider mechanism (6) is fixedly installed at the inner end bottom of the fuselage (1), and the crank slider mechanism (6) is provided with a piston (702) and a piston rod (703) at the upper end.

2. A high-voltage 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), and the output end of the diaphragm coupling (301) is connected with the input end of the crank slider mechanism (6).

3. A high-voltage 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) is fixedly connected with two connecting rod assemblies (602), the two connecting rod assemblies (602) are symmetrically distributed, and the connecting rod assemblies (602) are connected with two groups of cross head sliders (603) and two groups of slide ways (604).

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

5. A high-voltage high-power V-type reciprocating vacuum pump according to claim 1, characterized in that: The gas valve assembly (701) comprises a cover 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, 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 seal ring group (805), a first heat dissipation throttle ring (806) and a first O-shaped seal ring (807), the packing cavity (801) is filled with the packing body (802), the first O-shaped seal 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 throttle ring (901), a second O-shaped seal ring (902), a retaining ring (903), a second seal ring group (904), an auxiliary packing gland (905), an auxiliary packing body (906) and an oil scraper ring group (907), the blade edge of the oil scraper ring group (907) is arranged downward.

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

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

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