German BRINKMANN pump BRINKMANN model BRINKMANN price

BRINKMANN pumps generate centrifugal force through impeller rotation, acting on the liquid to impart pressure energy and velocity energy within the impeller. Part of this velocity energy is then converted into pressure energy within the pump casing or guide vanes to transport the liquid. They are generally classified by structural characteristics: By working pressure: low-pressure pumps with pressure below 1MPa; medium-pressure pumps with pressure between 1 and 6.5MPa; high-pressure pumps with pressure above 6.5MPa. By number of working impellers: single-stage pumps with only one impeller on the pump shaft; multi-stage pumps with two or more impellers on the pump shaft. By impeller inlet method: single-suction pumps with inlet on one side; double-suction pumps with inlets on both sides. By pump casing joint form: horizontal split pumps with the split line passing through the axis; vertical joint pumps with the joint surface perpendicular to the axis. By pump shaft position: horizontal pumps with the shaft in a horizontal position; vertical pumps with the shaft in a vertical position. By method of directing discharge from the impeller to the discharge chamber: volute pumps where discharge enters directly into a spiral-shaped pump casing; guide vane pumps where discharge passes through guide vanes to the next stage or to the outlet pipe. By installation location of the pump body: submersible pumps with the pump body underwater and the driver above water; submerged pumps with both the drive motor and pump body underwater; inline pumps with the pump and drive motor directly coupled and installed in the middle of the pipeline; deep well pumps installed in underground deep wells. By medium application: clean water pumps (including boiler feed pumps, circulation pumps, condensate pumps, etc.); slurry/impurity pumps (including sewage pumps, mud pumps, slag slurry pumps, gravel pumps, material slurry pumps); petrochemical process pumps (including chemical pumps, process pumps, barrel pumps, oil pumps, etc.); vacuum pumps (including water ring vacuum pumps, vane vacuum pumps, etc.).

BRINKMANN pump structure composition

The basic structure of a centrifugal pump consists of six parts: impeller, pump casing, pump shaft, bearings, sealing rings, and packing gland. 1) The impeller is the core component of the centrifugal pump; it operates at high speed with high output, and the blades on the impeller play a major role. The impeller must undergo a static balance test before assembly. The inner and outer surfaces of the impeller must be smooth to reduce friction loss of the water flow. 2) The pump casing, also known as the pump shell, is the main body of the water pump. It provides support and fixation and connects to the bracket holding the bearings. 3) The pump shaft connects to the motor via a coupling to transmit the motor's torque to the impeller, making it the primary component for transmitting mechanical energy. 4) Sliding bearings use transparent oil as a lubricant, filled to the oil level line. Too much oil will leak out along the pump shaft, while too little will cause the bearing to overheat and fail, leading to accidents! During pump operation, the maximum bearing temperature is 85 degrees, with normal operation around 60 degrees. 5) Sealing rings are also known as leakage reduction rings. 6) The packing gland mainly consists of packing, water seal ring, packing sleeve, packing gland cover, and water seal pipe. The main function of the packing gland is to seal the gap between the pump casing and the pump shaft, preventing water inside the pump from leaking out and air from entering the pump. It maintains the vacuum inside the water pump! When heat is generated by friction between the pump shaft and the packing, the water seal pipe directs water into the water seal ring to cool the packing, ensuring normal pump operation. Therefore, inspection of the packing gland requires special attention during routine pump inspections! The packing should be replaced after approximately 600 hours of operation.

BRINKMANN pump maintenance

Centrifugal pump shutdown is mainly caused by mechanical seal failure. Failure mostly manifests as leakage, with the following causes: 1) Leakage at the sealing faces of the stationary and rotating rings, mainly due to: end face flatness and roughness not meeting requirements, or surface scratches; particulate matter between the end faces preventing uniform operation; improper installation or incorrect method. 2) Leakage of the compensation ring O-ring, mainly due to: deformation of the gland cover, uneven preload; incorrect installation; O-ring quality not meeting standards; incorrect O-ring selection. Practical use indicates that the most common failure point for sealing elements is the end faces of the rotating and stationary rings. Cracking of the mechanical seal rotating and stationary ring end faces in centrifugal pumps is a common failure phenomenon, mainly caused by: 3) Excessive gap at the sealing face during installation, preventing the flush fluid from removing heat generated by the friction pair in time; flush fluid leaking through the sealing face gap, causing overheating and damage to the end faces. 4) Vaporization and expansion of the liquid medium, forcing the two end faces apart due to vaporization expansion force. When the two sealing faces are forced back into contact, the lubricating film is destroyed, causing overheating of the end face surface. 5) Poor lubricity of the liquid medium, combined with excessive operating pressure, causes asynchronous tracking rotation of the two sealing faces. For example, a high-speed pump with a speed of 20445r/min, a sealing face center diameter of 7cm, reaches a linear velocity of up to 75 m/s after operation. If one sealing face lags and cannot track the rotation, instantaneous high temperature causes sealing face damage. 6) Blockage of the seal flush fluid orifice plate or filter screen, resulting in insufficient water flow and mechanical seal failure.

BRINKMANN pump industry applications

Centrifugal pumps feature a compact structure, wide flow and head ranges, and are suitable for mildly corrosive liquids. They offer multiple control options, uniform flow, smooth operation, and low vibration, requiring no special vibration-damping foundations. Equipment installation, maintenance, and repair costs are low. They are widely used in industries such as power generation, metallurgy, coal, and building materials to transport slurries containing solid particles, such as hydraulic ash removal in thermal power plants, ore slurry transport in metallurgical concentrators, and coal slurry and heavy-medium transport in coal washing plants. When a centrifugal pump operates, it must be installed on land with the suction pipe submerged in water, and priming is required for startup. Due to structural constraints, submersible slurry pumps and vertical submerged centrifugal pumps require the motor to be positioned above the water surface while the pump is submerged; therefore, they must be securely fixed, otherwise the motor may fall into the water, resulting in motor scrapping. Furthermore, since the long shaft length is generally fixed, installation and use are more cumbersome, and application scenarios are subject to many restrictions.

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