CN201090500Y - Wear ring of water supply pump - Google Patents

Abstract

The utility model provides a wear-resistant wear ring of a feed water pump, used for preventing the influence on the flow, the lift and the efficiency of the feed water pump because the original wear ring is easy to cause the locking of the feed water pump rotor. The wear ring of the feed water pump in the utility model has a smooth outer surface and is characterized in that the wear ring has a honeycombed inner surface. After the adoption of the wear ring with the honeycombed inner surface in the feed water pump of the utility model, the feed water pump has less inside leak, low wear, good locking prevention property and good rotor stability; the pump unit has higher safe operating reliability in a power plant, has long service life and helps lower the operating cost of the power plant.

Description

The wear ring of feed water pump

Technical field

The utility model relates to the feed water pump technical field, specifically, relates to a kind of wear ring of feed water pump.

Background technique

The feed water pump wear ring is an easily damaged parts, and wear ring is got seal action at the high lower of pump impeller import, so the as easy as rolling off a log wearing and tearing of this part, may cause killing of pump rotor, influences flow, lift and the efficient of pump, even can influence the critical speed of rotation of pump.Safe operation to power plant causes adverse effect, increases maintenance cost simultaneously greatly.

Chinese patent ZL03210303.4 provides a kind of gland seal device of feed water pump, comprises sealing axle sleeve and seal cartridge, it is characterized in that being respectively equipped with rectangular recess on the interior circle of the cylindrical of described sealing axle sleeve and seal cartridge.Its structure relative complex of one side, the wear resistance deficiency of this device is in use damaged easily on the other hand, need often change.

The model utility content

The purpose of this utility model provides a kind of nonabradable feed water pump wear ring, causes the feed water pump rotor to kill to avoid wear ring, and influences flow, lift and the efficient etc. of feed water pump.

The technical problem that the utility model solved can realize by the following technical solutions:

A kind of wear ring of feed water pump, its outer surface is a smooth surface, it is characterized in that: the internal surface of described wear ring is cellular surface.

In the utility model, described cellular surperficial honeycomb hole is arranged in several rows along wear ring internal surface circumferential direction, and each honeycomb hole is all over against the slit between adjacent lines two honeycomb holes.

The wear ring of feed water pump of the present utility model, pump internal leakage loss reduces, hangs down wearing and tearing, prevents that the interlock performance is good, the rotor stability performance is good after adopting cellular surface abrasion ring, the pump group is higher in the safe operation reliability of power plant, and longer service life reduces the operating cost of power plant simultaneously.

Description of drawings

Fig. 1 is the structural representation of existing wear ring.

Fig. 2 is the structural representation of the utility model wear ring.

Fig. 3 is the utility model wear ring internal surface partial structurtes enlarged diagrams.

Embodiment

For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.

As shown in Figure 1; a kind of existing wear ring; its internal surface and outer surface are smooth surface, and its deficiency is, after wear ring is installed on the pump impeller axle; if have impurity particle between wear ring and the axle; when impeller shaft rotated, impurity particle was understood directly and impeller shaft rubs so, and time one length can cause the heavy wear of impeller shaft; can cause pump internal leakage loss, rotor operation instability, also can strengthen the consumption of electric energy simultaneously.

Referring to Fig. 2, wear ring 1 of the present utility model, its outer surface 2 is similar to existing wear ring, adopts smooth surface, and its internal surface 3 is cellular surface, and cellular surface is arranged by several honeycomb holes 31 and is constituted.

Referring to Fig. 3, behind internal surface 3 local amplifications the with wear ring 1, its structure proximate plane, honeycomb hole is arranged in several rows along wear ring internal surface circumferential direction, two honeycomb holes of colleague, for example 32 and 33 at a certain distance spacing separately, all over against the slit between adjacent lines two honeycomb holes, for example honeycomb hole 34 is over against the slit between honeycomb hole 32 and 33 for each honeycomb hole.

Even between impeller shaft 4 and the wear ring 1 impurity particle is arranged like this, also can fall into the honeycomb hole 31 of wear ring 1, therefore impurity particle can not cause the wearing and tearing to impeller shaft 4, the impeller shaft 4 that prolongs and wear ring 1 the two working life, make the stability of rotor operation increase substantially, and greatly reduce energy consumption.It is as follows that energy consumption is saved formula: $\mathrm{\ΔE}=\frac{\mathrm{\Δ\η}}{\mathrm{\η}0+\mathrm{\Δ\η}}\·P_{\mathrm{Ko}}\·t,$ Wherein Δ E is the energy saving amount, η ⁰For not using the efficient of cellular surface abrasion ring, Δ η is the efficient because of using cellular surface abrasion ring to improve, P _KoThe input power of pump when not having cellular surface abrasion ring, t is a year working time.The input power of pump is not 4068KW when having cellular surface abrasion ring, and a year feed water pump of 8000 hours of operation is an example, and not using the efficient of cellular surface abrasion ring is 79.4%, uses cellular surface abrasion ring and the efficient that improves is 1.5%, then $\mathrm{\ΔE}=\frac{1.5\%}{79.4\%+1.5\%}\·4068\mathrm{kW}\·8000h=603412\mathrm{kWh},$ Even calculate with 0.50 yuan/kWh, surplus every feed water pump also can save 30 in 1 year ten thousand yuan, the operating cost of power plant can reduce significantly.

More than show and described basic principle of the present utility model and major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims (3)

1. the wear ring of a feed water pump, its outer surface is a smooth surface, it is characterized in that: the internal surface of described wear ring is cellular surface.

2. the wear ring of feed water pump as claimed in claim 1, it is characterized in that: described cellular surperficial honeycomb hole is arranged in several rows along wear ring internal surface circumferential direction.

3. the wear ring of feed water pump as claimed in claim 2, it is characterized in that: each honeycomb hole is all over against the slit between adjacent lines two honeycomb holes.