Changsha Zoomlian Pump Co., Ltd. 长沙中联泵业股份有限公司

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    Self-balancing multistage mining pump type MDP
    Self-balancing multistage mining pump type MDP
    Self-balancing multistage mining pump type MDP
    Self-balancing multistage mining pump type MDP
    Self-balancing multistage mining pump type MDP
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    • Self-balancing multistage mining pump type MDP
    • Self-balancing multistage mining pump type MDP
    • Self-balancing multistage mining pump type MDP
    • Self-balancing multistage mining pump type MDP
    • Self-balancing multistage mining pump type MDP

    Category:

    Mining Multistage Pump

    Keywords:

    Pump

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    Self-balancing multistage mining pump type MDP

    Flow: 3.6-1345m³/h

    Lifting height: 72-1795m

    Efficiency: 30%-80%

    Pump weight: 160-6260kg

    Motor power: 5.8-4500kw

    Cavitation margin: 2.0-7.0m

    Price: 2.98-49.80 ten thousand

     

    Medium-sized feed water for mining with particle content ≤1.5%, particle size ≤1.3mm, temperature from -20℃ to 80℃, and other similar wastewater.

    +86 0731-88192288

    Customer service hotline

    info@cipump.com

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    Product Description Product Specifications Why Choose Us? FAQ

    Product description

    As one of the recognized national manufacturers of multistage centrifugal pumps, our company, to actively respond to the national call for energy saving and adherence to the sustainable development path, after studying and adopting advanced technologies of similar foreign products, and combining with years of pump design experience, has developed a series of high-efficiency and energy-saving self-balancing multistage pumps. This series of multistage pumps uses the hydraulic model recommended by the state, developed according to API610 standard, with advantages such as high energy efficiency, wide performance range, reasonable structure, good cavitation resistance, safe and stable operation, low noise, few wear parts, and easy installation and maintenance, positioning itself at the technological forefront of the industry. The MDP type self-balancing multistage pump is a wear-resistant multistage pump with outstanding anti-abrasive properties, with all flow path parts made of wear-resistant material, durable, with uniform flow, wide flow and head range, and reliable operation. It is suitable for transporting media with a certain percentage of solid particles and high abrasiveness, especially for drainage in coal mines or other mines, being an ideal equipment for mine drainage. Our company has more than 30 years of experience in the development and manufacture of multistage pumps, and the main products of the MDP series have obtained mining and coal safety certifications, being one of the main national manufacturers of multistage pumps for mining. We can offer design solutions and comprehensive services from the pump head to the motor, multistage pump accessories, installation, and commissioning, according to the user's working conditions and technical parameters.

     

    The self-balancing multistage pump innovates the traditional structure of the multistage centrifugal pump, eliminating the axial force balance device of common multistage pumps, and uses the mutual cancellation of the forces of symmetrically arranged impeller rotors to balance the axial force, effectively solving axial displacement. During operation, no efficiency losses caused by the friction of the balance disk or reflux occur, increasing efficiency by 3-12% compared to common multistage pumps of the same category. In addition, it completely eliminates failures such as wear or blockage of the balance disk and its seat due to balance device failures, significantly prolonging the pump's service life. Years of user experience demonstrate that our self-balancing multistage pumps have higher reliability and efficiency than traditional multistage pumps, with a fault-free operating time more than three times longer, effectively extending service life, directly saving production costs for users, and significantly reducing operation and maintenance costs.

           

           Image 1   Application scope of the MDP type wear-resistant self-balancing multistage pump

    Suitable for transporting medium mine water, slag water, wastewater, and wastewater containing particles ≤1.5%, particle size ≤1.3 mm, and temperature from -20℃ to 80℃, as well as other wastewater with similar physical and chemical properties.

    On-site photograph of the MDP type self-balancing multistage pump

     

           Image 1   Description of the structure of the MDP type self-balancing multistage pump for mining

         The MDP type self-balancing multistage pump for mining is supported at both ends, with a segmented casing, and the pump transmission is connected to the motor by a cylindrical pin elastic coupling.

    Pump rotation direction: viewed from the drive end, the pump rotates clockwise.

     

     

    Anatomical diagram of the self-balancing multistage pump structure
     
     
     
     
     

    1. Static part

    Mainly composed of the suction section (water inlet), middle section, discharge section (water outlet), guide vanes, secondary water inlet section, packing body (rear cover), and bearing body, all connected with tension bolts forming a unit. From the coupling end, the pump inlet is oriented horizontally to the right and the outlet vertically upwards.

    2. Rotating part

    Mainly composed of shaft, impeller, throttling shaft components, bearings, and sleeves.

    3. Pump sealing

    3.1 The static joint surfaces between the suction section (water inlet), middle section, discharge section (water outlet), and secondary water inlet section are sealed with sealing adhesive or molybdenum disulfide.

    3.2 Throttling sealing is used between the pump stages.

    3.3 Shaft seals on both sides of the pump use soft packing.

    3.4 A water retaining ring is used to prevent water from entering the bearings.

    4. Bearing part

    The complete pump rotor is supported by a cylindrical roller bearing according to the "GB/T283-94" standard at the drive end, and an angular contact ball bearing according to "GB/T292-94" at the opposite end. The bearings are lubricated with CD30 or CD40 mechanical oil up to the center of the oil sight glass inside the bearing housing. Due to the use of the angular contact ball bearing "GB/T292-94", the assembled rotor has no axial displacement.

     

           Image 1   Operating principle of the MDP type self-balancing multistage pump for mining:

    　　The pump shaft, driven by the motor, rotates the impeller, doing work on the liquid and increasing its rotational energy at high speed, so that the required amount of liquid is sucked from the inlet tank and successively passes through the pump inlet section, direct impeller, direct guide vanes, middle section, horizontal outlet, transition tube, secondary inlet section, reverse impeller, reverse guide vanes, until the vertical outlet, then discharged to the demand point.

       

           Image 1   The top 10 advantages of the self-balancing multistage pump compared to the traditional multistage pump

    1. New structure: the self-balancing multistage centrifugal pump has rotors with symmetrically arranged impellers, so that the axial forces generated by the direct and reverse impeller groups cancel each other out, eliminating the balance disk device which has small gaps, high pressure drop, easy erosion, wear, and failures, surpassing the traditional structure of multistage pumps;

    2. New technology: the self-balancing multistage pump features exclusive throttling and pressure reduction devices, as well as a balance device on odd stages, which also acts as an auxiliary support;

    3. High energy efficiency: the self-balancing multistage centrifugal pump uses an advanced hydraulic model that solves the wear and axial pulsations caused by the balance disk, always maintaining excellent alignment between the impeller and diffuser. During prolonged use, it prevents significant efficiency loss caused by wear of the balance disk and displacement of rotor components in conventional multistage pumps, eliminates balance water leakage, reduces volumetric losses, improves the overall operational efficiency of the pump, and reduces shaft power, with an average efficiency 3%-12% higher than traditional multistage pumps;

    4. High reliability: the self-balancing multistage centrifugal pump uses a self-balancing system that practically compensates for the axial force load generated during operation, minimizing rotor wear and system interference. The small residual axial force is supported by the thrust bearing, keeping the pump shaft always in tension, with a uniform distribution of forces and a significant reduction of peak stress compared to the original structure, which improves rotor stiffness and critical speed, notably increasing the stability and reliability of rotor operation;

    5. High stability: the self-balancing multistage centrifugal pump, thanks to the excellent symmetrical combination of the impeller and diffuser, along with appropriate clearance and a wide axial throttling design, maintains high stability and operational efficiency even after prolonged use;

    6. Good anti-cavitation performance: the self-balancing multistage centrifugal pump uses an optimized hydraulic model and structural design, with a double-suction impeller in the first stage, precise casting, and wear-resistant materials, giving it good anti-cavitation performance. The machine operates stably and quietly, without the need to install a preliminary pump or raise the inlet tank height;

    7. High mechanical seal reliability: because the rotor components of the self-balancing multistage centrifugal pump do not exhibit axial displacement or axial pulsations during start-up and shutdown, the problem of low mechanical seal reliability that traditionally affects multistage pumps has been overcome;

    8. Easy maintenance: the self-balancing multistage centrifugal pump is designed in 3D, with rotor components machined by numerical control, strictly ensuring the dimensions and precision of each part. This allows for quick assembly and disassembly, and replacement of seals and bearings without dismantling the pump body or the inlet and outlet pipes. General technical personnel can complete the process by following the assembly diagram's order and requirements, completely avoiding the need for specialized technicians to adjust and position axial displacement, offering great convenience to the user;

    9. Low maintenance rate: the self-balancing multistage centrifugal pump uses precise casting, reduces wear parts and the frequency of disassembly for maintenance, prolonging the product's service life and largely avoiding problems caused by frequent disassemblies, reducing maintenance costs;

    10. High adaptability: the self-balancing multistage centrifugal pump adopts an advanced combined modular design, with local components tested by intensive and prolonged use. The parts are highly interchangeable, eliminating the small-gap balance disk device, and it is more suitable than traditional multistage pumps for media with more adverse properties.

          

           Image 1   Comparative cost chart between self-balancing multistage centrifugal pump and traditional multistage centrifugal pump

    Cost analysis of the self-balancing multistage pump and the traditional multistage pump

    Product Parameters

    Description of the wear-resistant self-balancing multistage pump model type MDP for mining

     

     

    Performance parameters of the wear-resistant self-balancing multistage pump type MDP for mining (These data are for reference only, please take the actual order as the standard!)

     

    MD6-25P

    MD6-50P

    MD6-80P

    MD12-25P

    MD12-50P

    MD12-80P

    MD25-30P

    MD25-50P

    MD25-80P

    MD46-30P

    MD46-50P

    MD46-80P

    MD65-80P

    MD85-45P

    MD85-67P

    MD85-80P

    MD85-150P

    MD100-55P

    MD120-50P

    MD120-67P

    MD120-80P

    MD120-100P

    MD150-30P

    MD150-50P

    MD150-80P

    MD150-100P

    MD150-130P

    MD155-30P

    MD155-67P

    MD200-50P

    MD200-80P

    MD200-100P

    MD200-150P

    MD280-43P

    MD280-65P

    MD280-95P

    MD280-100P

    MD300-45P

    MD300-65P

    MD360-40P

    MD360-60P

    MD360-95P

    MD420-95P

    MD450-40P

    MD450-60P

    MD450-95P

    MD500-57P

    MD550-40P

    MD550-50P

    MD550-95P

    MD580-60P

    MD580-100P

    MD600-60P

    MD600-85P

    MD650-80P

    MD650-100P

    MD720-60P

    MD720-80P

    MD720-100P

    MD800-80P

    MD850-100P

    MD900-60P

    MD1100-85P

    200MD43P

    		 

    For more performance parameters of the self-balancing multistage pump type MDP for mining, please download the intelligent selection software on the pump selection page or call: 0731-88192288 for more information.

    Changsha Zhonglian Pump Industry Co., Ltd.

    Why Choose Us?

    Changsha Zhonglian Pump Industry Co., Ltd. was established in 1989, following the reform of the Changsha Water Pump Factory. It is a national high-tech comprehensive enterprise integrating design, research and development, manufacturing, and service. The company was listed on the Hunan Provincial Stock Exchange on December 31, 2019, with the abbreviated name "Zhonglian Pump Industry" and stock code: 600275HN. It is currently a key enterprise in China's centrifugal pump industry and one of the leading domestic manufacturers of multi-stage pumps, headquartered in Changsha, Hunan, a historical and cultural city in China.

    Changsha Zhonglian Pump Industry Co., Ltd.
    Changsha Zhonglian Pump Industry Co., Ltd.

    FAQ

    Q

    What products do you mainly produce?

    A

    Zoomlion Pump Industry manufactures various large industrial centrifugal pumps. The main products include: self-balancing multistage pumps, multistage centrifugal pumps, single-stage centrifugal pumps, split-case pumps, chemical pumps, submersible pumps, pipeline pumps, long-shaft pumps, condenser pumps, and more.

    Q

    Can you help me choose a model?

    A

    Of course! If the water pump model is not selected accurately, it can cause significant problems. After you take it back, it might be either too small to meet the usage requirements or too large, resulting in higher electricity and fuel costs, increasing the operating expenses.

    Q

    Why is the price quotation so slow?

    A

    Because centrifugal pumps are non-standard custom products with many models and a wide price range. Even for the same model, the price varies greatly depending on the materials and configurations used. Taking the most common pump accessory—the impeller—as an example, the price of a stainless steel impeller is several times that of a cast iron impeller. Therefore, we need to clearly confirm the relevant information to provide you with an accurate price. Normally, if you provide comprehensive information, we can quote within 5 minutes.

    Q

    What information should I provide when I need a quote?

    A

    Usually, if you want to get an accurate quote, it is recommended that you provide us with the following information: pump flow rate, head, on-site operating voltage, frequency, temperature of the conveyed liquid, pH value, solid particle content, on-site installation conditions (horizontal or vertical installation), and other related details. If you are not very familiar with these, it’s okay; our sales manager will assist you in determining them.

    Q

    Do you have centrifugal pumps in stock?

    A

    There are many models and configurations of centrifugal pumps. Except for a small number of commonly used standard models that are in stock, the vast majority of models and configurations are not stocked and are customized products. We need to first select the pump based on your site conditions such as flow rate, head, medium temperature, pH value, and installation conditions. After determining the pump model and configuration, we can then place an order with the workshop for production.

    Q

    What is your usual delivery time?

    A

    Models in stock can be shipped by the next day at the latest. Others are custom-made, and depending on the product size and specific project conditions, the delivery time is generally between 7-90 days. Please consult our sales manager for details: 0731-88632200 。

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