Overview of a 3GC three-screw pump:
3GC series three-screw pump for hydropower industry is a new type of medium-high pressure three-screw pump developed on the basis of 3G three-screw pump and 3GJ three-screw pump, which is used in oil supply system and oil pressure system of hydraulic turbine governor. Strictly in accordance with the three-screw pump national standard GB/T10886-2002 design, development and production of three-screw pump products.
Specification description of 2C3GC triple screw pump:
3G 60×4C R4U2.0 S
1 2 3 4 5 6
1. Series of three screw pumps, which conform to the standard of three screw, GB10886-2002.
Specification: main rod diameter × pitch number.
G = vertical mounting pump (bottom connection)
C = single outlet vertical mounting pump (upper connection)
C2 = double outlet vertical mounting pump (upper connection)
Screw angle: screw thread angle.
5. Structural characteristics and shaft seals:
Symbolic conjunctive theory to clarify the scope of application
1.0 Framework Oil Sealing-medium Lubrication, Vertical mounting
2.02 Mechanical Seal material combination: hard to Graphite 0 for sealing structure medium lubricity is good, temperature is less than 80 ℃
6. Special request: s indicates the special requirement of the user. According to the different requirements, it is represented by S1~S10, and the specific serial number is provided by the factory.
Main technical parameters of Sanji3GC three-screw pump:
1, traffic range: 10 / min 2000 L/min (L / min) 0.6~120m3/h (cubic / hour)
2, pressure range: 0: 6.3 Mpa. (Mupa, 0 0, 63 bar. 0-63kg/f) (kg force / square centimeter)
3, viscosity range of transport medium: 2-10000 cst. (Lis)
4, pump temperature: 100 ℃ (degrees Celsius)
5, allow maximum speed: 2900 r/min (r / min)
Application of three screw pump and fluid treatment medium: hydraulic oil, lubricating oil, turbine oil, thin oil, water glycol, antiwear hydraulic oil, often used in hydropower industry, hydropower station, hydraulic turbine unit of large oil film bearing lubrication, cooling cycle.
The commonly used model of Wux3GC triple screw pump is:
Semi-submerged three-screw pump
3G 25×6C - W 503G25×6C 3G25×4C 3G25×4C
3G 36×6C 23G 36×5C 3G 36×3C 2 3G36×3C2
3G 45×6C 23G 36×5C—F3G 36×3C 3G36×3C
3G 60×6C 3G 36×5C - FB3G36×3C—F3G36×3C—F
3G 70×6C 3G45×4C 23G 36×3C - FB3G36×3C-FB
3G 70×6C 23G 60×4C 3G45×3C 2 3G45×3C2
3G 80×6C 3G 70×4C 3G45×4C 2 3G60×3C
3G 85×6C 3G 70×4C 2 3G 60×3C 3G 70×3C
3G 85×6C 23G 80×4C 3G 60×4C 3G 70×3C2
3G 90×6C 3G85×4C 3G70×3C3G80×3C
3G 100×6C 3G85×4C 2G70×3C2G85x3C
3G 70×4C 3G85×3C2
3G 70×4C 23G90×3C
3G 80×3C 3G90×3C2
3G 80×4C 3G 100×3C
3G 85×3C 3G 100×3C2
Suspended three-screw pump
3G 45×4G 3G45×4G
4G 45×6G 3G55×4G
3G 55×6G 3G60×4G
3G 60×6G 3G70×4G
3G 70×6G 3G80×4G
3G 80×6G 3G85×4G
3G 85×6G 3G90×4G
3G 90×6G 3G100×4G
The key words of the three-screw pump are: hydroelectricity industry, special three-screw pump for hydropower station, hydraulic generating unit, oil supply system and oil pressure system for hydraulic turbine governor, special three-screw pump for hydropower station, suspension three-screw pump, Vertical three-screw pump 3GC three-screw pump
Sample data for selection of 7-3GC three-screw pump:
8. Important instructions on the selection and configuration of the screw pump group and the matters needing attention in the operation of the machine (for reference of design institute and site installation, use and maintenance personnel)
1. It is forbidden to idle without medium. Please add lubricating medium or conveying medium before starting.
2. all sundries and welding slag are strictly forbidden to enter the pump cavity, and the cleanliness of the pump cavity and pipe must be maintained.
3. Pipe filter or Y-type filter is strictly prohibited. Please ensure that the filter area is 20-40 times of the inlet diameter of the pump. According to the cleanliness of the medium, the mesh number of the filter net is correctly configured.
4. It is forbidden that the inlet and outlet pipeline of pump is not matched with the inlet and outlet pipeline of pump, and the configuration of pipeline diameter must be the same as the inlet and outlet diameter of pump. To avoid cavitation or self-absorption. If the pipe is too thin, it will lead to cavitation, which will cause the pump to work under the condition of not having enough food, leading to the drop of flow pressure and even abnormal vibration and noise of the three-screw pump group, and will also cause serious damage to the stuck pump and screw pump for a long time.
5. The installation height of the three - screw pump must take full consideration of the cavitation conditions of the pump and the self - suction capacity of the pump ( the cavitation margin is related to the medium viscosity speed and the lead of the screw ) .
6. Since the functions of packing, transportation, lifting, loading and unloading and pipe bolt fastening may easily cause the original factory location of the pump to change or even seriously misposition, so after the installation and fixing of the pipe system of the three-screw pump group, Be sure to recheck the coaxiality of the three-screw pump and the motor before starting the car.
7. It is strictly forbidden to start the boot with back pressure and close the inlet valve.
8. It is strictly prohibited to start rotation in the direction that does not conform to the pump rotation mark.
In parallel, double pumps must be added to the outlet and inlet of the pump with a one-way valve to prevent the reverse of the three-screw pump driven by the medium backflow.
Free adjustment of safety valve bolts is strictly prohibited. The safety valve is only used to protect the safety of the pump and the matching of the motor power with the working state of the pump, and is strictly forbidden to be used as the pressure regulating valve and the relief valve.