Water ring vacuum pump vvn1 6n with electric motor
Type: liquid ring vacuum pump.
The 2VVN1-6M pump is designed to pump out vapors and gases that are non-aggressive to cast iron in order to create a vacuum in the operating pressure range from atmospheric to 10 kPa and create a vacuum in technological processes in the chemical, pulp and paper, mining, textile, food, and metallurgical industries. , engineering, pharmaceutical and other industries, as well as in public utilities and agriculture.
Water ring vacuum pump 2VVN1-6MN is designed for pumping aggressive vapors and gases.
The working fluid in the pump is water.
The use of water ring pumps for pumping water-gas mixtures is allowed only if the bulk of the water is separated and removed at the pump inlet.
Failure to comply with this requirement can lead to an unacceptable overload of the electric motor and destruction of the working parts of the pump.
Type of climatic modification: UHL 4 in accordance with GOST 15150-69.
The 2VVN1-6MN pump is not intended for use in fire and explosion hazardous industries.
Basic technical data and parameters of the pump 2VVN1-6M
Performance reduced to initial conditions at initial pressure, 0.04 MPa: 6±0.6(m 3 / min).
Water consumption: 12 +2 -1 dm 3 /min.
Speed, synchronous: 1500 rpm.
Engine power no more: 11 kW.
Weight no more: 400 kg.
Material version of the pump 2VVN1-6M
Lobovin |
Building 1) |
Spacer(1) |
Shaft(1) |
Wheel(1) |
Disk |
Bearing housing(2) |
Seal sleeve(2) |
Pipeline(1) |
Water separator(1) |
MF20(2) |
Steel20 |
Steel40X or 30X13 |
SCH20 or Steel20 |
Steel20(2) |
MF20 |
Steel20 |
Steel20 |
Material version of the pump 2VVN1-6MN
Lobovin | Building 1) | Spacer(1) | Shaft(1) | Wheel(1) | Disk | Bearing housing(2) | Seal sleeve(2) | Pipeline(1) | Water separator(1) | ||||
MF20 | Steel 12X18H10T | - | Steel30X13 | Steel12X18H10T | Steel14X17H2 | MF20(2) | - | Steel 20 | Steel 20 | ||||
Steel 12X18N9L(2) | Steel 12X18H10T | - | Steel14X17H2 | Steel12X18H10T | Steel14X17H2 | MF20(2) | - | Steel 20 | Steel 20 |
Pump performance values at inlet temperature: water - plus 15 o C, gas - plus 20 o C and water flow. As the water or gas temperature rises, the performance decreases.
The device and operation of the pump 2VVN1-6M
The water ring vacuum pump consists of the pump itself and the electric motor mounted on a common horizontal frame and connected by an elastic coupling closed by a casing.
A water separator is installed on the discharge branch pipes of 2VVN1-6 pumps.
The operation of the liquid ring pump is based on the fact that when the impeller rotates, a rotating water ring "K" is formed in the housing. The wheel is located eccentrically relative to the shell of the body and therefore its blades are either immersed in the water ring "K" to the hub itself, or almost come out of it, as a result of which a space free from water is formed between the blades. When the blades leave the water ring due to the increase in free volume, gas is sucked in the chamber between the blades through the window "B" in the disks of the fronts. Then, when the impeller turns, the gas in the chambers is compressed by a water ring approaching the hub and, when combined with the discharge window "H" in the disk, is forced out of it.
The heat generated by gas compression and fluid friction raises the temperature of the rotating water ring. To maintain the temperature at a given level, more than cold water from the water supply network, which flows into the water ring, displacing the heated water into the injection hole along with compressed gas. Water is supplied to the pump through a system of pipelines and channels in the pump heads.
From the pump, the mixture of gas and water enters the water separator, where the bulk of the water is separated from the gas and drained into the sewer.
Pumps 2VVN1-6 have a double-sided supply and removal of gas from the working chamber.
The pump consists of a housing 8, two heads 6 with gas distribution disks 7, bearing housings 3 in which there are spherical bearings 1 carrying the shaft 10. On the shaft, eccentrically located in the housing, a wheel 9 is mounted, fixed with bushings 13 and nuts 4 from the axial movement.
With the help of distance rings 2, sandwiched between the bearing housing 3 and bearing 1, the gaps between the wheel and the gas distribution disks are set. The gaps between the ends of the wheel and the discs must be the same on both sides.
The pump shaft is sealed with stuffing box packing 12. Between the rings of which there is a lantern ring 11. Water is supplied through the hole in the lantern ring to seal and cool the stuffing box seal. The glands are located in the central bores of the fronts.
The stuffing box is a soft cotton greasy packing, the sealing of which is carried out periodically by pressing the box 5.
You can't press the seals too hard. It is necessary that the seals pass water in the form of drops.
Graph of the dependence of performance on the pressure at the inlet to the pump 2VVN1-6M
Preparation of the pump 2VVN1-6M for use and its use
Loading and unloading work must be performed in accordance with the requirements of GOST 12.3.020-80.
Installation and dismantling of the pump, its operating conditions must comply with the requirements of the "Rules for the Design and Safe Operation of Stationary Compressor Units, Air Ducts and Gas Pipelines".
When installing the pump, it is necessary to provide convenient access for maintenance. Placement and grounding of pump equipment at the place of operation must be carried out in accordance with the requirements of GOST
12.2.007.0-75. The ground conductor is connected to the ground bolt located on the motor or on the pump frame.
To reduce the noise generated by the pump, it is recommended that the gas from the water trap be vented outside the room through a pipeline.
In this case, the sound level generated by the pump at a distance of 1 m from the pump from its circuit in the nominal mode should not exceed 80 dBa.
To ensure protection against overloads and short-circuit currents, the motor must be supplied with power through a circuit breaker.
Current value, ampere: 2VVN1-6 - 25.
Rules and procedure for inspecting and checking the readiness of the pump for use
The vacuum pump 2VVN1-6M must be installed on a foundation, which is a concrete pad with plan dimensions 200-300 mm larger than the pump frame and a height of about 500-600 mm. The pump frame must be fixed to the foundation with foundation bolts and must be rigid.
After the installation of the pump on the foundation and fixing, it is necessary to check the correct alignment of the pump with the electric motor. The degree of alignment accuracy is considered sufficient if, during rotation of the motor shaft, the inner surfaces of the coupling halves do not touch each other, while the nuts for fastening the pump and motor to the frame must be tightened to failure. The misalignment of the shafts of the VVN-2 pump and the engine is eliminated with the help of gaskets installed under the legs of the pump or engine.
Instructions for switching on and testing the operation of the pump
Before turning on the 2VVN1-6M pump, check and, if necessary, tighten all nuts and bolts of the pump and pipelines. Check the reliability of grounding.
Turn the pump shaft by the coupling half by hand a full turn to make sure that there is no binding or any damage.
Connect the motor to the mains. Start and immediately stop the motor to check the direction of rotation of the shaft. The direction of rotation must correspond to that indicated by the arrow on the pump. Shaft rotation in the other direction is not allowed.
Before putting the pump into operation, make sure that the machine has been properly stored and that it has not expired. In this case, the internal surfaces of the pump are not subject to depreservation and inspection, and disassembly of the machine is not required.
Recommended installation scheme for measuring instruments
Overall and connecting dimensions of the pump 2VVN1-6
Using the pump 2VVN1-6M
Start the pump 2VVN1-6M in the following order:
Turn on the engine;
Open the valve on the water supply pipeline;
Open the valve on the suction pipe;
Adjust the water supply with a valve to carry out the desired work process.
Stop the pump in the following order:
Close the water supply valve;
Close the valve on the suction pipe;
Close the valve on the discharge pipeline;
Stop the engine;
Drain the water from the pump.
The water used to operate the 2VVN1-6M pump should not contain suspended particles in an amount of more than 25 mg/l, water hardness should not exceed 3 mg equiv./l. The water pressure at the pump inlet must exceed the discharge pressure by at least 0.03 MPa. When using water that does not meet the requirements of this paragraph, the pump performance may be reduced by 50% compared to the original. To restore the performance of the pump, it is necessary to clean the internal surfaces of the pump from settling water suspensions.
Operation of the pump at a pressure below 0.01 MPa (75 mm Hg) is not allowed.
The pump must not be operated without water.
Possible malfunctions of the pump 2VVN1-6M and recommendations for actions in case of their occurrence
Fault name |
Probable Cause |
Remedy |
The pump does not give performance in a given mode. |
Air suction through suction pipe connections. Air suction through seals on the shaft. Not enough water is supplied to the pump. Uneven water supply from the water supply, the holes for the passage of water are clogged. |
Tighten nuts or replace gaskets. Tighten the seals or replace the cuff. Set the water supply to the required quantity. Blow out the holes with compressed air, while the pump drain plugs must be turned out. |
The shaft does not turn manually or turns with noticeable resistance and sticking. |
The alignment of the pump and motor shafts is broken. |
Check alignment, re-align if necessary. |
Reduction of gaps between rotating and stationary parts due to the deposition of solid particles or sediments on their surfaces. |
Tighten all the nuts for fastening the heads to the housing and the bearing housings to the heads, as well as the blind cover to the bearing housing. Loosen the nuts holding the stuffing box bushings. Press the stuffing evenly while the machine is running. Dismantle the pump, clean the surfaces from dirt or scale. |
Maintenance of the pump 2VVN1-6M
Maintenance of the pump should be periodic and include preventive inspection, cleaning and lubrication.
The first preventive inspection should be carried out after 300-500 hours of pump operation. Further periodicity Maintenance depends mainly on the degree of contamination of gas and water and is mainly determined empirically.
The pump is disassembled incompletely - for revision, cleaning and lubrication of bearings, and complete - for repair and replacement of parts.
Before dismantling the pump and the water separator, remove water through the drain holes. The machine is disconnected from the pipelines, the water separator is removed, the electric motor is disconnected from the electrical wires. Remove the pump from the frame by disconnecting the coupling.
During disassembly, all gaskets must be carefully removed and, if damaged, replaced during assembly with new ones of the same thickness.
Disassembly of the 2VVN1-6M pump is carried out in the following order:
Remove the coupling half from the shaft and remove the key; - unscrew the bolts from covers 14, 17 and remove them; - unbend the lock washer 15, unscrew the nut 16 and remove the lock washer; - release the nuts pressing the bushings of stuffing boxes 5; - unscrew the nuts or bolts fastening the bearing housings 3 to the fronts 6 and remove the housings together with the ball bearings from the shaft with a puller; - unscrew the nuts securing the fronts to the body, separate the fronts and, supporting the shaft, remove them from the shaft; - remove the shaft with the wheel from the body.
The pump is assembled in the reverse order of disassembly.
Before assembly, all mating surfaces must be thoroughly cleaned of gasket residues and rubbed.
All seating surfaces and threads must be thoroughly wiped and lubricated with clean machine oil.
Old grease from bearings and housings must be removed. To lubricate bearings, use CIATIM-221 GOST 9433-80.
The most crucial moment of the assembly is to establish the gap between the end planes of the wheel and the gas distribution disks.
These gaps should not exceed the following dimensions:
For pumps 2VVN1-6 from 0.1 to 0.3 mm.
If the pump is stopped for a long time, it is necessary to preserve its internal surfaces. To do this, it is necessary to unscrew all the drain plugs, drain the water from the pump, dry it, start the engine, while pouring cannon grease into the suction pipe of the pump and immediately stop the engine. Lubricant quantity for pumps:
2VVN1-6 - 2 l.
Resources, service life and storage of pumps 2VVN1-6M
resource to first overhaul 20,000 hours, including a shelf life of 1 year in the manufacturer's packaging in warehouses.
Overhaul life 3000 hours.
The resources and service life of components are determined in accordance with individual passports for them.
Storage conditions - 2 (C) according to GOST 15150-69.
Manufacturer's (supplier's) warranty
The manufacturer guarantees that the pump complies with the requirements of TU 3648-015-00218526-2000, provided that the consumer observes the operating, transportation and storage conditions established by the technical specifications.
The warranty period of operation of the pump is 12 months with a warranty operating time not exceeding 1400 hours.
Calculation of the warranty period in accordance with applicable law.
The manufacturer guarantees the free elimination of defects that have arisen through the fault of the manufacturer, and the replacement of parts that have become unusable during the warranty period.
Transportation
2VVN1-6M pumps can be transported by all types of transport in covered vehicles, subject to the rules for the transportation of goods in force on the transport of the corresponding type, ensuring the safety of the pump from mechanical damage and precipitation.
Transportation conditions:
In terms of the impact of climatic factors 8 (OZH-3) according to GOST 15150-69; - in terms of the impact of mechanical factors - medium (C) according to GOST 23170-78.
Single-acting water ring machine, horizontal with axial gas flow through suction and discharge ports, stuffing box seal.
VVN 6 liquid ring pump consists of the following main parts: housing, two end caps, bearing housings, shaft, impeller. The material from which the parts of the flow part are made is gray cast iron, carbon steel.
The principle of operation of the pump VVN1 6:
When the impeller rotates, the water entrained by the blades, under the action of centrifugal forces, is thrown to the periphery of the cover, forming a free volume. Between the hub of the working disk and the inner surface of the water ring of the VVN 6 pump, a rarefied space is created, which ensures the suction of gas through a large crescent-shaped cutout in the pump housing. The next turn of the wheel compresses the pumped gas. Through a small crescent cut in the housing, gas and excess water are ejected into the pump discharge pipe. Partially, water from the chambers of the VVN 1 6 pump passes through the glands, cools them and at the same time creates a seal. in water ring machines, the movement of air from the suction pipe to the discharge pipe takes place continuously and evenly.
Pumped liquid:
Vacuum pump VVN 1-6 and an electric pump unit based on it, designed to create a vacuum when operating in air or inert gases that are insoluble in water and non-aggressive to materials of the flow part of the VVN pump. Water ring machines do not require purification of the gas entering them.
Symbol of the electric pump unit VVN:
Pump VVN 1-6 U3, where ВВН1 - vacuum, liquid ring pump with
nominal suction pressure 0.04MPa
6 - performance of the vacuum pump, m 3 / min
U3 - general climatic design and category of placement
VVN pump price.
Pump VVN 1-6 with dv 15*1500 72500 rubles
Pump VVN1-6
VVN pumps are used for suction of air, various gases (except for aggressive ones) and mixtures of steam and gas, freed from moisture in a droplet form. They run on water or another liquid such as engine oil.
VVN pumps are used in various fields of activity:
- in agriculture, they ensure the operation of milking machines;
- in tobacco production, tobacco is dried with their help;
- at enterprises Food Industry these pumps are used for degassing vegetable oils;
- in housing and communal services they are used to fill pipelines with liquid;
- in confectionery factories, they are used to speed up the process of cooking caramel.
In addition to these areas, VVN pumps are used in the pulp and paper, chemical, gas, oil and other industries.
Design features and principle of operation of VVN1-6
The design of the pumping unit includes the VVN pump itself and the electric motor that plays the role of a drive. They are mounted on a common frame.
The pump casing, made of cast iron, has discharge and suction cavities. They communicate with the main (working) cavity through the small and large sickle-shaped cutouts, respectively.
A bronze disk with blades is fixed on the shaft of the VVN pump, which plays the role of a rotor.
Before starting, the pump housing is filled up to the axis with water or other liquid. When the rotor rotates, it is carried away by the blades and is thrown to the outer edge of the cover that closes the housing, forming a ring. A vacuum occurs in the internal volume of the pump, due to which air or gas is sucked in. Then it is discharged into the discharge pipe, which is part of the design of the VVN pump.
Pure, free from mechanical impurities, water continuously circulates through the pumping unit. This ensures the removal of heat generated by rubbing parts and gas during its compression.
Several important advantages
The wide distribution of VVN pumps is explained not only by their versatility. These devices have several other advantages:
- their design is simple and therefore reliable;
- friction of parts during their operation is minimal, which ensures a significant motor resource;
- VVN pumps have a low sensitivity to pollution, which expands the scope of their application and increases their service life. As experience shows, they are operated for many years without requiring maintenance and repair.
Deciphering the marking
Marking of the VVN pump can begin with a number. It indicates the serial number of the model upgrade.
The number is followed by the abbreviation "VVN". It indicates the type of device and stands for "vacuum water ring pump".
The number after the abbreviation indicates the nominal suction pressure developed by the pump: 1 - 0.4 kgf / cm2, 2 - 0.2 kgf / cm2.
After the performance value, a hyphen is placed, followed by the climatic version of the VVN pump and the category of its placement (for example, UHL4).