CN2713186Y - Dreg slurry pump - Google Patents

Abstract

A high-efficiency slurry pump is most suitable for the transportation of coal solid-liquid two-phase fluid, and is also suitable for the transportation of solid-liquid two-phase fluid in industries such as electric power, metallurgy, chemical industry and construction. The multiphase flow theory is adopted, the arc-like compound profile is adopted, the shape of the sheath adopts the quasi-helical profile, and the shape of the blade of the impeller adopts the multi-phase flow hydraulic model line, so that the shape of the inner cavity of the flow-passing part fully conforms to the composite of multi-phase media. The movement track adopts double-end mechanical seal and auxiliary impeller combined seal. The bearing assembly set on the impeller drive shaft is composed of cylindrical roller bearings and angular contact ball bearings. The energy of the pump body can be fully converted and the friction force can be minimized. , The sealing problem is completely solved, the efficiency of conveying slurry is high, the maximum head of the pump can reach 101.6 meters, and the flow rate is 90-1800 cubic meters per hour. It has compact and reasonable structure, long sealing service life, no leakage, high production efficiency, low noise, stable operation, low vibration, and wide practicability.

Description

A high-efficiency slurry pump

1. Technical field

The utility model relates to a high-efficiency slurry pump, which is especially suitable for the transportation of coal solid-liquid two-phase fluid, and also suitable for the transportation of solid-liquid two-phase fluid in industries such as electric power, metallurgy, chemical industry and construction.

2. Background technology

As a kind of liquid conveying equipment, slurry pump is mainly used in solid-liquid two-way pumping in industries such as coal, electric power, metallurgy, non-ferrous metals, power plant ash removal, mining, municipal engineering, pipeline transportation, petrochemical industry, salt mining engineering and construction. With the rapid development of my country's national economy, the market demand for slurry pumps continues to increase. However, the current domestically produced slurry pump products generally have a series of problems such as shaft seal leakage and poor sealing effect, which lead to a series of problems such as reduced efficiency and service life of the pump. As the key construction part of the slurry pump, the shaft seal, the quality of the shaft seal directly affects the leakage of the slurry pump. Leakage not only pollutes the environment, shortens the service life of the bearing, but also causes serious wear and tear of the shaft seal and sleeve, which shortens the maintenance cycle of the slurry pump, restricts the application and development of the slurry pump in various industries, and causes manpower A great waste of material resources, slurry pump shaft seal leakage has become a worldwide recognized problem. At present, there are nearly 10,000 slurry pumps in operation across the country, and nearly 10,000 are required for new projects and updates every year. Due to the leakage of the shaft seal of the pump, which pollutes the environment, endangers the bearings, and the packing is seriously worn, the pumps are frequently overhauled, and a lot of manpower and material resources are wasted. The average cost of maintenance work is 20,000 yuan per unit.

3. Contents of the invention

In view of the shortcomings of the existing technology, the purpose of the utility model is to provide a high-efficiency slurry pump with reasonable structure, good shaft sealing effect, no leakage and long service life.

The utility model relates to a high-efficiency slurry pump, which comprises a sheath, a pump cover, a front guard plate, a rear guard plate, a bracket, an impeller drive shaft arranged on the bracket, a slurry pump body and a slurry pump body arranged in the slurry pump body. The impeller is set on the head of the transmission shaft, the shape of the sheath is a quasi-spiral profile, the blade shape of the impeller is a multi-phase flow hydraulic model line, and the impeller shaft close to the inner side of the impeller is provided with an auxiliary impeller and the decompression cover, the diameter ratio of the impeller and the auxiliary impeller is 0.7, and a mechanical seal assembly is provided on the outside of the decompression cover; a bearing assembly composed of a cylindrical roller bearing and an angular contact ball bearing is provided on the drive shaft of the impeller, and the bearing assembly passes through the isolation The ring is set on the arc bracket positioned as a large semicircle; the sheath is provided with a suspension ring, and a water tank is provided above the mechanical seal assembly, and there are two circulating water pipes connected to the mechanical seal assembly on the water tank. The front guard plate and The positioning connection between the rear guard plate, the sheath and the pump cover is a right angle, and a sealing ring is arranged at the right angle connection.

The utility model is a high-efficiency slurry pump. The mechanical seal assembly is a double-end mechanical seal assembly, which is composed of a static ring, a dynamic ring, a spring and a shaft sleeve that are placed on the drive shaft in a symmetrical order, and the static rings are respectively fixed. On the decompression cover and the sealing water jacket; the angular contact ball bearing is composed of two ball bearings, the ball bearings are arranged face to face, and an oil cup is arranged between the two bearings; the sheath, the front guard plate, the impeller and the rear guard plate are made of high wear-resistant material KmTBCr15Mo3Ti; the overall span of the bracket is increased by 1/3.

The utility model is a high-efficiency slurry pump, which is mainly used in coal, metallurgy, non-ferrous metals, power plant ash and slag removal, mining, and can also be used in municipal engineering pipeline transportation, petrochemical industry, salt mining engineering and other industries. Starting from reducing the sealing pressure, the multiphase flow theory is adopted, and the arc-like composite profile makes the inner cavity shape of the flow-passing part completely conform to the composite motion track of the multi-phase medium. The shape adopts the multiphase flow hydraulic model line, and adopts double-end mechanical seal plus auxiliary impeller combined seal. The diameter ratio of the main impeller and auxiliary impeller is designed to be 0.7. The bearing assembly set on the impeller drive shaft consists of cylindrical roller bearings and angular contact Ball bearing structure, compared with the existing technology, the average hardness of the flow parts after quenching is increased from HRc60 to HRc65, and the anti-wear life is increased by 20-30%. The sealing problem is solved, the efficiency of conveying slurry is high, the maximum head of the pump can reach 101.6 meters, and the flow rate is 90-1800 cubic meters per hour. It has compact and reasonable structure, long sealing service life, no leakage, high production efficiency, low noise, stable operation, low vibration, and wide practicability.

4. Description of drawings

Accompanying drawing is the structural diagram of the utility model.

5. Specific implementation

An embodiment of the utility model will be further described below in conjunction with accompanying drawing:

The utility model is a high-efficiency slurry pump, which is mainly composed of a slurry pump body 7, a transmission assembly and a cooling water tank 18. The slurry pump body 7 is composed of a sheath 1, a front and rear pump cover 2, a front guard plate 3, and a rear guard plate 6 components, and the front and rear pump covers 2 are all provided with suspension rings. The shape of the sheath 1 is a quasi-spiral profile. The slurry pump body 7 is provided with an impeller 4 and an auxiliary impeller 5. The impeller 4 is arranged at the head of the transmission shaft 14. The shape of the blade is a multiphase flow hydraulic model line. The auxiliary impeller 5 is located on the drive shaft 14 behind the rear guard plate 6 close to the inside of the impeller 4, and the diameter ratio of the impeller 4 and the auxiliary impeller 5 is 0.7. A decompression cover 9 fixed on the rear pump cover is installed behind the auxiliary impeller 5, and a mechanical seal assembly 10 is arranged behind the decompression cover 9 to form a double-end mechanical seal plus an auxiliary impeller combined seal. The double-end mechanical seal assembly 10 is composed of a static ring, a moving ring, a spring and a bushing that are placed on the drive shaft 14 in a symmetrical order, and the static ring is respectively fixed on the decompression cover 9 and the sealing water jacket 19 . The impeller transmission shaft 14 is provided with a bearing assembly 13, the bearing assembly 13 is mainly composed of a cylindrical roller bearing 18 and an angular contact ball bearing 15, and the bearing assembly 13 is arranged on the arc bracket 11 positioned as a large semicircle through a spacer ring 17; A suspension ring 21 is provided on the sleeve 1 , a cooling water tank 20 is provided above the mechanical seal assembly 10 , and two circulating water pipes connected to the mechanical seal assembly 10 are provided on the cooling water tank 20 . The positioning connection between the front guard plate 3 and the rear guard plate 6 and the sheath 1 and the pump cover is a right angle, and a leak-proof sealing ring is provided at the right angle joint. Angular contact ball bearing 15 is made up of two ball bearings, and ball bearing is arranged face to face, is provided with the oil cup 15 that injects lubrication between two bearings. Sheath 1, front guard plate 3, impeller 4 and rear guard plate 6 are made of high wear-resistant material KmTBCr15Mo3Ti, whose hardness is greatly improved. The integral span of bracket 11 increases 1/3, and its column can be four, also can be six, and bracket 11 is provided with the adjusting bolt 12 that adjusts its position.

Claims (5)

1. efficient slag stock pump, it comprises sheath (1), pump cover (2), apron plate (3), back backplate (6), carriage (11), be located at the impeller shaft (14) on the carriage (11), slag stock pump body (7) and be located at impeller (4) in the slag stock pump body (7), impeller (4) is located at the head of transmission shaft (14), it is characterized in that: described sheath (1) is shaped as similar spiral shape molded lines, the blade shape of impeller (4) is a multiphase flow hydraulic model line, be provided with sub-propeller (5) and decompression lid (9) near the inboard impeller shaft (14) of impeller (4), the diameter ratio of impeller (4) and sub-propeller (5) is 0.7, and decompression lid (9) outside is provided with mechanical sealing assembly (10); Impeller shaft (14) is provided with the bearing unit (13) that is made of roller bearing (18) and angular contact ball bearing (15), and bearing unit (13) is arranged on the arc carriage (11) of orientating big semicircle as by spacer ring (17); Sheath (1) is provided with suspension ring (21), the top of mechanical sealing assembly (10) is provided with cooling water tank (20), cooling water tank (20) is provided with two circulating pipes that are communicated with mechanical sealing assembly (10), the place of being located by connecting between described apron plate (3) and back backplate (6) and sheath (1) and the pump cover is the right angle, and the joint, right angle is provided with seal ring.

2. a kind of efficient slag stock pump according to claim 1, it is characterized in that: described mechanical sealing assembly (10) is the double mechanical seal assembly, it is made up of stationary ring, rotating ring, spring and axle sleeve that the order of symmetry is enclosed within on the transmission shaft (14), and stationary ring is separately fixed on decompression lid (9) and the sealed water jacket (19).

3. a kind of efficient slag stock pump according to claim 1, it is characterized in that: described angular contact ball bearing (15) is made up of two ball bearings, and ball bearing is provided with face-to-face, is provided with lubricating cup (16) between two bearings.

4. a kind of efficient slag stock pump according to claim 1 is characterized in that: described sheath (1), apron plate (3), impeller (4) and back backplate (6) adopt high abrasive-resistant material KmTBCr15Mo3Ti to manufacture.

5. a kind of efficient slag stock pump according to claim 1 is characterized in that: the whole span of described carriage (11) increases 1/3.

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