Vehicle-mounted medium and low voltage stepless conversion fire pump
A fire pump, stepless technology, applied in the field of vehicle-mounted medium and low pressure fire pumps, can solve problems such as large volume and complex structure, and achieve the effect of simplifying operation procedures, reducing meridional force and axial load, and ensuring efficient operation.
Inactive Publication Date: 2010-09-29
蚌埠市鑫键机械有限公司
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Problems solved by technology
[0003] The purpose of the present invention is to provide an improved vehicle-mounted medium and low pressure fire pump in order to overcome the shortcomings of the existing medium and low pressure fire pumps, such as complex structure and bulky volume.
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[0013] like figure 1 As shown, the vehicle-mounted medium and low pressure stepless conversion fire pump provided by the present invention is mainly composed of: the inner cavity of the pump casing 6 is a double scroll chamber structure, and an impeller 2 is connected to the main shaft 8 of the inner chamber of the pump casing 6 to cooperate with the double scroll chambers. The main shaft on one side of the pump casing is connected to the reducer 4, and the front cover 7 of the pump casing is provided with an annular warm water groove 7b and a warm water nozzle 7a to warm the pump components, and the method of citing the circulating water heating pump for engine cooling is adopted, that is, after the engine is started The temperature of the circulating water reaches above 50°C in a few minutes. This circulating water is introduced into the annular warm water tank 7b through the warm water nozzle 7a, so that the water inlet temperature of the pump water inlet is significantly in...
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The invention relates to a vehicle middle-low voltage stepless conversion fire pump. The fire pump is characterized in that a pump shell 6 has a double volute chamber structure; and a mainshaft (8) is connected with an impeller (2) and is matched with a double volute chamber. The mainshaft on one side of the pump shell is connected with a speed reducer (4); and a front cover (7) is provided with an annular water warming groove (7b) and a water warming nozzle (7a) as a pump warming part. The fire pump has the following advantages: according to a similar design principle, the fire pump utilizesa speed coefficient method and adopts a suspending arm type structure of a single-step impeller; the direct change of the rotational speed can meet the technical requirements of two working conditions of middle voltage and low voltage, thereby saving a huge and complicated middle-large conversion mechanism, reducing the size and the weight of the pump and simplifying an operation program. The single volute shell and double volute chamber structure can make current inside a water pressure chamber tend symmetrical, can effectively reduce radial acting force and axial load and ensure the high-efficient operation of the pump.
Description
Technical field: [0001] The invention relates to a fire-fighting pressure water pump, in particular to a vehicle-mounted medium and low pressure fire-fighting pump used in a fire truck. technical background: [0002] Traditional fire pumps are mostly double impeller series-parallel structures, which have the disadvantages of high spindle speed, high power and low output efficiency. When the pressure is low, the first and second stage impellers discharge water at the same time, the outlet pressure is 1MPa, and the flow rate is twice that of the medium pressure; when the medium pressure is required, the low pressure water from the first stage impeller enters the second stage impeller, and the second stage impeller is in the first stage impeller. On the basis of the low pressure water sent in, it is increased to medium pressure and then sent out, the outlet pressure is doubled compared with the low pressure water, and the flow rate is 0.5 times the low pressure flow rate. In t...
Claims
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IPC IPC(8): F04D29/20F04D29/24F04D29/42F04D1/06A62C27/00
Inventor 金传璞陈殿莲曹计夏春恒姚斌殷友好
Owner 蚌埠市鑫键机械有限公司