Novel large flow gear pump

Abstract

The invention relates to a pump and particularly relates to a novel large flow gear pump which conveys various chemical media or oil or water or toxic and harmful or flammable and combustible liquids and is large in flow, high-temperature and high-pressure resistant, corrosion-resistant and acid and base resistant. According to the design, by adopting a bigger bump body inner cavity which pumps a large flow as well as thicker and longer shafts and wider gears, the gear pump is coupled with a short shaft or a long shaft of a self-centering structure by magnetic drive and mechanical sealing mode of a coupler with an elastomer to connect drive of the pump and the motor by innovating the design structure, improving the technical process and reasonably selecting a metal and non metal combined material, so that various working conditions of large flow, high-temperature, high pressure and various viscosities can be satisfied. Various chemical media which are relatively rigorous are efficiently conveyed, so that the defects in the prior art are overcome or the blank is filled, zero leakage and no pulse are truly realized, the problem that the existing shaft seal leaks is solved, and the pump can be widely applied to various industries such as petroleum, chemical industry, papermaking and tobacco.

Description

technical field [0001] The present invention relates to a pump, in particular to a new type of pump with high flow, high temperature and high pressure, corrosion resistance, acid and alkali resistance for conveying various chemical media or oil or water or toxic, harmful or inflammable and explosive liquids. gear pump. Background technique [0002] Most of the current gear pumps use a pair of gears meshing with each other to deliver liquid, and the delivery flow is not very large. Generally, the gear pump with the maximum flow rate of 82L / M is quite good. Under the working conditions with a difference of 15.5 bar or an outlet pressure of about 21 bar, the flow rate cannot be reached basically, and the effective delivery of the pump cannot be ensured, or the pump cannot be started at all, which greatly limits the gear pump under the condition of large flow. The application cannot meet the needs of current production and life. [0003] Most of the existing gear pumps are gea...

AI Technical Summary

Problems solved by technology

[0002] Most of the current gear pumps use a pair of gears meshing with each other to deliver liquid, and the delivery flow is not very large. Generally, the gear pump with the maximum flow rate of 82L / M is quite good. Under the working conditions with a difference of 15.5 bar or an outlet pressure of about 21 bar, the flow rate cannot be reached basically, and the effective delivery of the pump cannot be ensured, or the pump cannot be started at all, which greatly limits the gear pump under the condition of large flow. The application cannot meet the needs of current production and life

[0003] Most of the existing gear pumps are gear oil pumps, which barely transport low-pressure and low-temperature (such as about 70°C) oils with self-lubricating liquids. It is difficult to convey the medium normally. Due to the simplicity and insufficiency of the current design and processing, and the inability to select the appropriate combination of metal and non-metal materials, it is dangerous for toxic, harmful, volatile, easy to corrode, easy to crystallize, and various harsh chemical materials. The medium cannot be transported correctly and effectively, so its application range is very limited. Its use accuracy, measurement level, cycle efficiency, transmission performance, installation and maintenance are difficult to meet the requirements of current production and life. The wear of pumps and gears is very severe. Maintenance Difficulty, high cost of use, low efficiency of the pump, so the service life of the pump is very short

[0004] Most of the existing gear pumps use a simple mechanical coupling to connect the pump and the motor through the long-axis coupling method, and convert the mechanical energy output by the motor into hydraulic energy through the gears, but this simple connection will lead to The centering of the motor shaft cannot be guaranteed, which will lead to unbalanced pressure on the pump shaft and the mechanical seal, resulting in a large radial load, which limits the increase in pressure, and easily leads to leakage, unstable liquid flow, and high pulsation. Large, the noise is particularly loud, so that the interface or pipes will vibrate, the equipment is easily damaged, and directly affects the normal service life of the pump, especially the toxic, harmful, volatile, easy to corrode, easy to crystallize, and dangerous media, which will cause damage to the environment. destruction of resources, waste of resources, and more serious injuries to personnel, so they cannot be widely and effectively used

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