CN2502051Y - Single-stage centrifugal oil pump - Google Patents

Abstract

The utility model discloses a single-stage centrifugal oil pump. The pump consists of a pump body, a pump cover, an impeller, a pump axis, an impeller nut, a gasket, a mechanical seal, a mechanical seal pressure cover and suspension parts. The angle of the outlet of the impeller gradually reduces. The impeller extends to the absorption opening. The width of the outlet and the outer diameter is larger than the oil pump of the same type. The utility model has the advantages that the single-stage pump can be used as a multi-stage pump and has a large flux, a wide range of adaptability, efficient wide area, and high efficiency and saves the purchasing cost.

Description

The one-stage centrifugal oil pump

Technical field

The utility model relates to the liquid pump series products.

Background technique

At present; the one-stage centrifugal oil pump of all kinds of models all is pump series products that a kind of lift, flow can not change; its flow of one-stage centrifugal oil pump and the lift that are a kind of Dimensions model are determined; but in production application; run into pipe-line system through regular meeting and do not make change; requirement makes a change lift, the flow of one-stage centrifugal oil pump, to adapt to lift, changes in flow rate.To this requirement, current, whole one-stage centrifugal oil pump can only taking to change different model realized.Obviously, the single performance of existing one-stage centrifugal oil pump brings inconvenience to the user, and need purchase the oil pump of new model for the variation that adapts to lift, flow, has increased the equipment purchasing financial charges, dwindle the accommodation of oil pump, reduced the utilization rate of pump series products.

Summary of the invention

The purpose of this utility model be exactly at existing one-stage centrifugal oil pump lift, flow is single and unmodifiable technical problem, design provides a kind of one-stage centrifugal oil pump, by to key core workpiece in the pump---the improvement design of impeller general structure and dimensional parameters, the lift of one-stage centrifugal oil pump that reaches same model specification is variable, flow is adjustable, enlarge one-stage centrifugal oil pump using scope, saves the purpose of purchasing the pump fund.

Basic design of the present utility model is, the one-stage centrifugal oil pump is made of the pump housing, pump cover, impeller, pump shaft, impeller nut, packing ring, mechanical seal, mechanical seal cover and sprung parts assembling, and the blade outlet angle of impeller diminishes gradually, i.e. α ₁＜α ₂＜α ₃, impeller extends the h=2-3 millimeter to suction port, and its exit width is compared with the same model oil pump increases 1-4 millimeter, i.e. b ' ₂=b ₂+ (1-4) millimeter, outside dimension is compared with the same model oil pump and is strengthened 20-70 millimeter, i.e. D ' ₂=D ₂+ (20-70) millimeter.

The utility model is by above-mentioned four the change designs to impeller, make variable 5 times of the lift of one-stage centrifugal oil pump, flow doubles, efficient improves (2-3) %, has single-stage pump and can work as that multistage pump uses, the changes in flow rate scope is big, applied widely, it is wide efficiently to distinguish, characteristics that efficient is high, the pump fund is purchased in saving.

Description of drawings

Fig. 1 is an one-stage centrifugal oil pump general structure schematic representation;

Fig. 2 is that the leaf head angle of impeller changes structural representation;

Fig. 3 is that impeller strengthens structural representation to suction port extension, exit width and outside dimension thereof.

Piece number explanation among the figure:

1, the pump housing, 2, pump cover, 3, impeller, 4, pump shaft, 5, impeller nut, 6, packing ring, 7, mechanical seal, 8, mechanical seal cover, 9, sprung parts, 10, blade.

Embodiment

Below in conjunction with accompanying drawing the utility model optimum implementation is described in detail.The one-stage centrifugal oil pump is made of the pump housing 1, pump cover 2, impeller 3, pump shaft 4, impeller nut 5, packing ring 6, mechanical seal 7, mechanical seal cover 8 and sprung parts 9 assemblings, and wherein blade 10 exit angles of impeller 3 diminish gradually, i.e. α ₁＜α ₂＜α ₃Impeller 3 extends the h=2-3 millimeter to suction port; The exit width size of impeller 3 is compared with the same model oil pump increases 1-4 millimeter, i.e. b ' ₂=b ₂+ (1-4) millimeter; The outside dimension of impeller 3 is compared with the same model oil pump and is strengthened 20-70 millimeter, i.e. D ' ₂=D ₂+ (20-70) millimeter.

During the operation of this pump, pump shaft 4 impeller 3 high speed rotating make liquid suck from the pump housing 1 suction port, discharge from the outlet of the pump housing 1 under impeller 3 and blade 10 effects.Impeller 3 extends to suction port, has improved pump efficiency; Blade 10 exit angles of impeller 3 diminish gradually, and efficient was more stable when lift was changed; Impeller 3 exit width increases make its flow become big, move behind the efficient point, and range of flow broadens; Impeller 3 external diameters strengthen and impel lift to become big.

Claims (1)

1. A kind of one-stage centrifugal oil pump, this oil pump is made of the pump housing (1), pump cover (2), impeller (3), pump shaft (4), impeller nut (5), packing ring (6), mechanical seal (7), mechanical seal cover (8), sprung parts (9) assembling, blade (10) exit angle that it is characterized in that impeller (3) diminishes gradually, i.e. α ₁＜α ₂＜α ₃Impeller (3) extends the h=2-3 millimeter to suction port; The exit width size of impeller (3) is compared with the same model oil pump increases 1-4 millimeter, i.e. b ' ₂=b ₂+ (1-4) millimeter; The outside dimension of impeller (3) is compared with the same model oil pump and is strengthened 20-70 millimeter, i.e. D ' ₂=D ₂+ (20-70) millimeter.

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