CN201865924U

CN201865924U - Marine tangent pump

Info

Publication number: CN201865924U
Application number: CN2010206127963U
Authority: CN
Inventors: 姜庆华; 顾才宝; 王洪英
Original assignee: JIANGYAN CITY DEHUA MARINE PUMPS MANUFACTURING Co Ltd
Current assignee: JIANGYAN CITY DEHUA MARINE PUMPS MANUFACTURING Co Ltd
Priority date: 2010-11-18
Filing date: 2010-11-18
Publication date: 2011-06-15
Anticipated expiration: 2020-11-18

Abstract

The utility model discloses a marine tangent pump, which comprises a motor, a carrier, a pump body, a pump shaft, a seal expander, a mechanical seal, a gland, an impeller, a pump cove and a bolt. The motor and the pump body are connected directly through the carrier, the mechanical seal and the seal expander are mounted on the pump shaft, and the gland and the pump body are matched with the axial positioning mechanical seal to form a sealed cavity for storing lubricating oil. The impeller is mounted at the end of the pump shaft and locked by the nut to form a rotating structure following the motor. The pump cover and the pump body match with each other to form a pump chamber for mounting the impeller. The impeller is of an open structure, and in an axial gear shape, eight to sixteen long and short radial blades uniformly distributed at intervals are exposed on the side plate face of the impeller, and an axial balance hole is arranged between one long blade and one short blade. The radial blades are wider inside and narrow outside. An impeller disc of the marine tangent pump is low in friction loss, small in axial force, high in structural strength and high in impact resistance. Additionally, the mechanical seal is fine in cooling condition while excessive temperature difference cannot be generated between the mechanical seal and a medium, and thereby the marine tangent pump is difficult to damage.

Description

Tangent pump peculiar to vessel

Technical field

The utility model relates to a kind of centrifugal water pump, and specifically, the utility model relates to a kind of tangent pump of being made up of the open architecture impeller, the supporting water pressure tank peculiar to vessel of this pump.

Background technique

The living water of large and medium-sized boats and ships and wash water are concentrated by the water pressure tank of configuration and are supplied with.Water pressure tank peculiar to vessel is a kind of year pressure accumulator, and its hydraulic pressure is kept by pump.The existing supporting water pump of water pressure tank mainly contains two classes, and using maximum is horizontal centrifugal vortex pump, secondly is vertical centrifugal pump, and the hydraulic performance of these two kinds of pumps all can satisfy the supporting requirement of water pressure tank peculiar to vessel.But, during actual the use the supporting mechanical seal of the impeller of horizontal centrifugal vortex pump and vertical centrifugal pump fragile, directly influence the reliability that boats and ships supply water.The impeller of horizontal centrifugal vortex pump is a closed type structure, and its thin-walled cover plate cannot stand the impact of impurity in the water and ftractures.The structural imperfection of vertical centrifugal pump is that axial force causes motor string axle, and string axle makes the mechanical sealing element unidirectional load excessive and decrease.In addition, vertical centrifugal pump the start up period lack cooling protection to mechanical seal, the friction pair of mechanical seal is in the dry friction situation before the suction of being unrealized, its temperature is very high.In case realize suction, because of water causes mechanical seal explosion damage with friction pair temperature difference Da Yi.Boats and ships are a kind of flowing carriers, are subjected to condition restriction and space little, and inconvenient maintenance is so have high requirements to the reliability of corollary equipment.Existing horizontal centrifugal vortex pump and vertical centrifugal pump do not meet the supporting requirement of water pressure tank peculiar to vessel because of there being structural imperfection aspect reliability.

The model utility content

The utility model is primarily aimed at existing ship with supporting horizontal peripheral pump or the fragile present situation of vertical centrifugal pump of water pressure tank, proposes a kind of rational in infrastructure, good reliability, and hydraulic performance meets the tangent pump peculiar to vessel of the supporting requirement of water pressure tank peculiar to vessel.

The utility model is achieved through the following technical solutions technical goal.

Tangent pump peculiar to vessel, it comprises motor, carriage, the pump housing, pump shaft, sealing expanding piece, mechanical seal, gland, impeller, pump cover and nut.Described carriage is the coupling of frame structure, connect the motor and the pump housing on the end face that its two ends are parallel to each other respectively, pump shaft is connected with the motor shaft fit, pump shaft stretches into suit mechanical seal and sealing expanding piece on the shaft part in the pump housing, and gland cooperates not only axially locating mechanical seal but also forms a seal chamber that holds lubricant oil with the pump housing.Described impeller location and installation becomes with the motor rotational structure at the pump shaft shaft end and by nut check, and pump cover cooperates the pump chamber that constitutes the arrangement impeller with the pump housing.Its improvements are: described impeller is an open architecture, axially be gear shape, the exposed alternate radial blade of uniform length on its lateral plates, the lateral plates middle part is provided with the longitudinal balance hole of a Φ 5mm～Φ 10mm between each length radial blade, the shape and the pump chamber of radial blade width aspect match, be inner wide and outer narrow, angle α=6 between the hypotenuse of radial blade and the side plate plane °～10 °.

Exposed uniform 8～16 radial blades that length is alternate on the impeller lateral plates, impeller diameter is greatly then got the radial blade of a greater number, otherwise then gets the radial blade of lesser amt.

The utility model compared with prior art has following good effect:

1, the utility model adopts the impeller of open architecture, its simple in structure, easy manufacturing;

2, the impeller of open architecture only has the side plate face, has reduced disc friction, and the lateral plates one-tenth-value thickness 1/10 is bigger, and so strong shock resistance is long service life;

3, the utility model adopts the impeller of radial blade structure, blade water intake and water outlet relative current angle are 90 °, and flow---head curve is smooth, and lift changes little during changes in flow rate, this pump performance curve satisfies the operating mode demand of water pressure tank peculiar to vessel, keeps water delivery pressure constant;

4, the unshrouded impeller end thrust is little, and mechanical seal is turned round under the normality situation, good sealing effect and not fragile;

5, adjust the pump housing and impeller package size, can obtain different performance curves, easily satisfy the demand of different operating modes.

Description of drawings

Fig. 1 is the utility model structural profile schematic representation;

Fig. 2 is the axial enlarged diagram of Fig. 1 impeller;

Fig. 3 is that enlarged diagram is analysed and observe in the side of Fig. 2.

Embodiment

Below with reference to the accompanying drawings and in conjunction with the embodiments, the utility model is described in further detail.

Tangent pump peculiar to vessel shown in Figure 1 is a kind of vertical structure pump, and it comprises motor 1, carriage 2, the pump housing 3, pump shaft 4, sealing expanding piece 5, mechanical seal 6, gland 7, impeller 8, pump cover 9 and nut 10.The carriage 2 that is positioned at the stage casing is the coupling of frame structure, and its both ends of the surface are parallel to each other, and the upper-end surface connects motor 1, and the lower end surface connects the pump housing 3.Pump shaft 4 is connected with the output axle head fit of motor 1, and pump shaft 4 stretches into suit mechanical seal 6 and sealing expanding piece 5 on the shaft part in the pump housing 3.Gland 7 cooperates not only axially locating mechanical seal 6 but also forms a seal chamber that holds lubricant oil with the pump housing 3.Impeller 8 location and installation lock with motor 1 rotational structure at pump shaft 4 shaft ends and by nut 10, and pump cover 9 cooperates the pump chamber that constitutes arrangement impeller 8 with the pump housing 3.Impeller 8 in the utility model is an open architecture, axially is gear shape, the exposed alternate radial blade 8.1 of uniform length on its lateral plates.Present embodiment is JT type ship tangent pump, this pump duty Q=2.0m ³/ h, lift H=50m, necessary electromotor 1 power 2.2kw, rotating speed is 2900r/min.12 blades 8.1 that length is alternate of supporting impeller 8 configurations, wherein 6 be linear leaf, other 6 be short blade.In order to reduce end thrust, between the alternate blade 8.1 of each length of impeller 8 lateral plates middle part, be provided with the equalizing orifice 8.2 of a Φ 6mm.The shape and the pump chamber of radial blade 8.1 width aspects match, i.e. inner wide and outer narrow, angle α=8 between the hypotenuse of radial blade 8.1 and the side plate plane °.

Impeller 8 is an open architecture in the utility model, and side plate is only arranged, and significantly reduces disc friction.The side plate of unshrouded impeller 8 is thicker relatively, has higher intensity, is difficult for being washed out by impurity in the water.Uniform equalizing orifice 8.2 on the side plate of unshrouded impeller 8, the pressure of favourable balance impeller 8 both sides, the axial force of elimination pump shaft 4 makes mechanical seal 6 at the normal state lower seal, keeps excellent sealing performance for a long time.Cooperate the mid-removal of lubricant of Seal cage that forms with the pump housing 3 at gland 7, help mechanical seal 6 the start up period cooling and lubricated, avoid mechanical seal 6 after pump is realized self-priming, bursting accident to take place greatly because of the temperature difference.Satisfy the supporting requirement of water pressure tank fully by the tangent pump peculiar to vessel of above-mentioned design, the operational failure rate is low, and is easy to maintenance.

Claims

1. tangent pump peculiar to vessel, it comprises motor (1), carriage (2), the pump housing (3), pump shaft (4), sealing expanding piece (5), mechanical seal (6), gland (7), impeller (8), pump cover (9) and nut (10); Described carriage (2) is the coupling of frame structure, connect the motor (1) and the pump housing (3) on the end face that its two ends are parallel to each other respectively, pump shaft (4) closes with motor (1) axle sleeve and is connected, pump shaft (4) stretches on the shaft part in the pump housing (3) suit mechanical seal (6) and seals expanding piece (5), and gland (7) cooperates not only axially locating mechanical seal (6) but also forms a seal chamber that holds lubricant oil with the pump housing (3); Described impeller (8) location and installation locks with motor (1) rotational structure at pump shaft (4) shaft end and by nut (10), and pump cover (9) cooperates the pump chamber that constitutes arrangement impeller (8) with the pump housing (3); It is characterized in that: described impeller (8) is an open architecture, axially be gear shape, the exposed alternate radial blade (8.1) of uniform length on its lateral plates, the lateral plates middle part is provided with the longitudinal balance hole (8.2) of a Φ 5mm～Φ 10mm between each length radial blade (8.1), the shape and the pump chamber of radial blade (8.1) width aspect match, be inner wide and outer narrow, the hypotenuse of radial blade (8.1) and angle α=6 between the side plate plane °～10 °.

2. tangent pump peculiar to vessel according to claim 1 is characterized in that: the exposed alternate radial blade (8.1) of uniform 8～16 length on described impeller (8) lateral plates.