阅读说明：本技术 一种具有内部制冷系统的水环泵 (Water ring pump with internal refrigerating system ) 是由 黄锋 于 2019-08-07 设计创作，主要内容包括：本发明公开了一种具有内部制冷系统的水环泵,包括叶轮轴、叶片、泵体,所述泵体两端设置有密封端盖,叶轮轴通过轴承偏心安装在泵体端盖上,叶片设置安装在叶轮轴上,泵体上设置有抽气口与排气口,叶片内设置有冷凝腔、节流孔和蒸发腔,冷凝腔设置在靠近叶轮轴一端,蒸发腔设置在叶片内远离叶轮轴一端,冷凝腔与蒸发腔通过节流孔相连通,叶轮轴内固定设置有压缩机,压缩机将叶轮轴分为高压蒸汽腔与低压蒸汽腔,低压蒸汽腔设置有低压蒸汽流道与蒸发腔相连通,高压蒸汽腔设置有高压蒸汽流道与冷凝腔相连通,所述低压蒸汽流道与蒸发腔间设置有制冷工质流道。本发明解决了现有水环泵工作水温提高严重,限制抽吸能力的问题。(The invention discloses a water ring pump with an internal refrigerating system, which comprises an impeller shaft, blades and a pump body, the improved centrifugal compressor is characterized in that sealing end covers are arranged at two ends of a pump body, an impeller shaft is eccentrically mounted on the end covers of the pump body through a bearing, blades are arranged on the impeller shaft, an extraction opening and an exhaust opening are formed in the pump body, a condensation cavity, a throttling hole and an evaporation cavity are formed in each blade, the condensation cavity is arranged at one end close to the impeller shaft, the evaporation cavity is arranged at one end far away from the impeller shaft in each blade, the condensation cavity is communicated with the evaporation cavity through the throttling hole, a compressor is fixedly arranged in the impeller shaft and divides the impeller shaft into a high-pressure steam cavity and a low-pressure steam cavity, the low-pressure steam cavity is provided with a low-pressure steam flow channel which is communicated with the evaporation cavity, the high-pressure. The invention solves the problems that the working water temperature of the existing water ring pump is seriously improved and the pumping capacity is limited.)

1. A water ring pump having an internal refrigeration system, characterized by: including impeller shaft (2), blade (3), the pump body (4) both ends are provided with end cover, and impeller shaft (2) are installed on pump body (4) end cover through bearing off-centre, and impeller shaft (2) one end stretches out end cover and motor output shaft power connection, blade (3) set up and install on impeller shaft (2), and blade (3) set up one at least, are provided with extraction opening (5) and gas vent (6) on the pump body (4), be provided with small-size refrigerating system in blade (3).

2. A water ring pump with an internal refrigeration system as set forth in claim 1, wherein: the small-size refrigerating system comprises a condensation cavity (31), an orifice (32) and an evaporation cavity (33) which are arranged inside a blade (3), wherein the condensation cavity (31) is arranged at one end close to an impeller shaft (2), the evaporation cavity (33) is arranged at one end, far away from the impeller shaft (2), of the blade, and the condensation cavity (31) is communicated with the evaporation cavity (33) through the orifice (32).

3. A water ring pump with an internal refrigeration system as set forth in claim 2, wherein: the impeller shaft (2) is internally and fixedly provided with a compressor (21), the compressor (21) divides the impeller shaft (2) into a high-pressure steam cavity and a low-pressure steam cavity, the low-pressure steam cavity is provided with a low-pressure steam flow channel (22) communicated with an evaporation cavity (33), the high-pressure steam cavity is provided with a high-pressure steam flow channel (23) communicated with a condensation cavity (31), and a refrigeration working medium flow channel (34) is arranged between the low-pressure steam flow channel (22) and the evaporation cavity (33).

4. A water ring pump with an internal refrigeration system as set forth in claim 3, wherein: the compressor (21) is connected with an external power supply through a wire, a control mainboard is arranged on the compressor (21), the control mainboard is connected with a controller through a signal transmission line, and the controller is arranged on a water ring pump shell.

5. A water ring pump with an internal refrigeration system as set forth in claim 4, wherein: the blade tip of the blade (3) is provided with a temperature sensor, and the temperature sensor is connected to the control mainboard through a lead.

6. A water ring pump with an internal refrigeration system as set forth in claim 2, wherein: the throttle hole (32) is provided in a tapered shape.

Technical Field

The invention relates to the field of water ring vacuum pumps, in particular to a water ring pump with an internal refrigeration system.

Background

A water ring vacuum pump, called water ring pump for short, realizes the processes of air suction, compression and air exhaust by utilizing the variable volume of a cavity, and belongs to a variable-volume vacuum pump. When the impeller rotates clockwise, the working water is thrown to the periphery by the impeller, and due to the action of centrifugal force, the water forms a closed circular ring with the same thickness on the inner side of the shell, at the moment, a crescent space is formed between the impeller and the water ring, and the space is divided into a plurality of small cavities with the same number of blades by the impeller. If the upper part 0 degree of the impeller is taken as a starting point, the volume of a small cavity is changed from small to large when the impeller rotates for 180 degrees, and the cavity forms vacuum to suck gas through the pumping hole; when the impeller continues to rotate, the volume of the small cavity which sucks the gas is reduced from large to small, the gas in the cavity is continuously compressed and pressurized, and the pressurized gas is discharged out of the pump along the exhaust port.

The water ring pump has the greatest disadvantage of low ultimate vacuum degree due to the working principle of the water ring pump. The reason is mainly that the working medium of the water ring pump is water, which is limited by the saturated vapor pressure of water, and the saturated pressure corresponding to water at 30 ℃ is 4.2kPa at normal temperature, so that the ultimate vacuum which can be obtained by the water ring pump is generally 2-4kPa, and other vacuum pumping devices have to be adopted when the requirement of higher vacuum degree is met, for example, the working pressure is up to 0.5kPa through a series atmospheric ejector.

On the other hand, the working water rotates at a high speed in the pump, the continuous increase of the temperature directly influences the working pressure of the water ring pump, reduces the pumping capacity and finally influences the thermal efficiency of the chemical process. In order to ensure that the temperature of the working water is always below a limit value, a set of circulating water cooling system needs to be configured for the water ring vacuum pump, although the problem of vacuum degree caused by the temperature rise of the working water is relieved to a certain extent by adopting an external circulation cooling mode, the fact situation is that the temperature of the external circulation cooling water reaches over 35 ℃ in summer, and the cooling effect is extremely poor at the moment; the rotation power consumption of the pump and the high-temperature steam brought by the pumped non-condensable gas cause the working water in the water ring pump to reach more than 50 ℃, so that the pumping capacity of the water ring pump is seriously reduced, and the ultimate vacuum degree of the water ring pump is 12.4kPa when the working water temperature is 50 ℃.

It can be seen from the actual working process of the water ring pump that the water ring pump is widely applied to the industries of chemical industry, mine, paper making, metallurgy and the like due to the advantages of simple structure, strong pumping capability, low cost and the like. But because the extreme vacuum of the water ring pump is low, the working performance depends on the temperature of working water to a great extent. In order to improve the pumping capacity of the water ring pump, an external circulating cooling water system, an auxiliary vacuum pumping system and even a mode of providing cooling water by a refrigerating unit have to be adopted. The investment cost of the vacuum system is increased, the external circulating cooling water system is large in occupied area and difficult to arrange, and the problem that the design vacuum degree is still difficult to meet under the working condition in summer is a great challenge to be solved in the field of water ring pumps.

Disclosure of Invention

The invention aims to provide a water ring pump with an internal refrigeration system, which can effectively solve the problems of high working water temperature, low ultimate vacuum degree and low pumping capacity of the common water ring pump.

In order to solve the technical problems, the invention adopts the following technical scheme:

the water ring pump with the internal refrigerating system comprises an impeller shaft, blades and a pump body, wherein sealing end covers are arranged at two ends of the pump body, the impeller shaft is eccentrically arranged on the end covers of the pump body through a bearing, one end of the impeller shaft extends out of the sealing end covers to be in power connection with a motor output shaft, the blades are arranged and arranged on the impeller shaft, at least two blades are arranged, an air suction opening and an air exhaust opening are formed in the pump body, and a small refrigerating system is arranged in each blade.

Furthermore, small-size refrigerating system is including setting up at inside condensation chamber, orifice and the evaporation chamber of blade, the condensation chamber sets up and is being close to impeller shaft one end, and the evaporation chamber sets up and keeps away from impeller shaft one end in the blade, and the condensation chamber is linked together through the orifice with the evaporation chamber.

Further, a compressor is fixedly arranged in the impeller shaft, the compressor divides the impeller shaft into a high-pressure steam cavity and a low-pressure steam cavity, the low-pressure steam cavity is provided with a low-pressure steam runner communicated with the evaporation cavity, the high-pressure steam cavity is provided with a high-pressure steam runner communicated with the condensation cavity, and a refrigerating working medium runner is arranged between the low-pressure steam runner and the evaporation cavity.

Further, the compressor is connected with an external power supply through a wire, a control mainboard is arranged on the compressor and connected with a controller through a signal transmission line, and the controller is arranged on a water ring pump shell.

Further, the blade apex is provided with temperature sensor, temperature sensor passes through the wire and connects on the control mainboard.

Further, the throttle hole is provided in a tapered shape.

Compared with the prior art, the invention has one of the following beneficial effects:

1. The impeller is internally provided with a set of small refrigeration system, the working water temperature in the working process of the water ring pump is transferred to heat the sucked gas and is directly discharged out of the system, the working water temperature is maintained in a better working range all the time, and the problems that the working water temperature of the existing water ring pump is seriously improved and the suction capacity is limited are solved.

2. The invention completely gets rid of the complex structure that the working water of the water ring pump seriously depends on the external circulating cooling system, has compact integral structure and small occupied area, and is suitable for the occasions with high vacuum requirement and severe working environment.

Drawings

fig. 1 is a left side view of the present invention.

fig. 2 is a front view of the impeller and impeller shaft of the present invention.

Fig. 3 is an internal structural view of a blade in the present invention.

In the figure: 2-impeller shaft, 3-blade, 4-pump body, 5-suction opening, 6-exhaust opening, 7-working water, 8-suction gas, 21-compressor, 22-low pressure steam flow channel, 23-high pressure steam flow channel, 31-condensation chamber, 32-orifice, 33-evaporation chamber, 34-refrigeration working medium flow channel, 35-porous medium coating, 36-heat release section, 37-heat insulation section and 38-heat absorption section.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.