CN214887809U - Stationary blade adjustable axial flow fan with novel oil lubrication system - Google Patents

Abstract

The utility model belongs to the technical field of the fan, especially an adjustable axial fan of quiet leaf with novel oil lubrication system. The fan is composed of a motor, an intermediate shaft, an air inlet box, a large collector assembly, a small collector assembly, an adjustable front guide vane assembly, a casing assembly, an impeller, a main bearing assembly, a rear guide vane assembly, a cold air cover, an inlet oil pipe, an outlet oil pipe, an atmosphere balance pipe, a diffuser, a cold air pipeline assembly and the like. The method is characterized in that: the main bearing assembly is provided with an inlet oil way, an atmosphere balance hole, an oil discharge port and an oil return pipeline which are communicated with each other, a platinum thermal resistance hole, two seals and two cooling air flow channels, an oil retainer is arranged between the shaft sleeve and the radial roller bearing, and a framework oil seal and a labyrinth seal are arranged between the shaft sleeve and the front bearing cover. Atmospheric balance pipe anterior segment be ascending notch cuttype, communicate each other between each atmospheric balance hole, its core barrel bottom of back stator assembly design have the oil drain hole, back stator export design has the steel pipe.

Description

Stationary blade adjustable axial flow fan with novel oil lubrication system

Technical Field

The utility model belongs to the technical field of the fan, especially an adjustable axial fan of quiet leaf with novel oil lubrication system.

Background

The stationary blade adjustable axial flow fan has the advantages of simple structure, wear resistance, high efficiency and the like, and is widely applied to thermal power stations and metallurgical industry. Along with the continuous improvement of energy-concerving and environment-protective requirement for the unit is towards high-efficient and the large-scale rapid development, and current wind cigarette system changes into the fan combination mode of "increase unification" mostly, so require more and more high to the fan rotational speed, but the high rotational speed operation of fan can make the bearing generate heat and increase, and the bearing temperature risees, finally influences the stability ability of fan. The cooling and lubricating modes of the traditional stationary blade adjustable axial flow fan bearing are air cooling and grease lubrication, the cooling and lubricating effects are not ideal, and particularly in summer, great confusion is brought to users, and the strong demand of forced thin oil lubrication for the stationary blade adjustable axial flow fan in the market is met in order to guarantee the safety and stability of long-term operation of the fan.

Therefore, the static blade adjustable axial flow fan with the novel oil lubricating system is developed, so that the personalized requirements of users can be met, and the domestic technical blank in the aspect of the static blade adjustable axial flow fan oil lubricating system is filled.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a to the problem that the adjustable axial fan bearing grease lubrication of traditional quiet leaf exists, designed an adjustable axial fan of quiet leaf with novel oil lubrication system to this life and the fan operating performance that improve the bearing. The novel adjustable stationary blade axial flow fan is creatively designed, so that the defects of the traditional grease lubrication are overcome, and the fan can stably run for a long time.

The technical scheme of the utility model: a stationary blade adjustable axial flow fan with a novel oil lubricating system mainly comprises a motor, an intermediate shaft, an air inlet box, a large current collector assembly, an adjustable front guide blade assembly, a small current collector assembly, a casing assembly, an impeller, a main bearing assembly, a rear guide blade assembly, a cold air cover, an inlet oil pipe, an atmosphere balance pipe, an outlet oil pipe, a diffuser, a cold air pipeline assembly and the like. The motor drives the intermediate shaft to rotate, the intermediate shaft drives the impeller to rotate and apply work to the air flow, the whole oil lubrication system starts to operate, and the air continuously cools and seals the bearing through the cold air pipeline. The air flow entering from the air inlet box passes through a large current collector, an adjustable front guide vane, a small current collector, an impeller, a rear guide vane and a diffuser respectively, and finally the whole working process of the fan is finished.

The method is characterized in that: the novel oil lubrication system comprises a main bearing assembly, an inlet oil pipe, an atmosphere balance pipe, an outlet oil pipe and the like, wherein the main bearing assembly is provided with an inlet oil way, an atmosphere balance hole, an oil discharge port and an oil return pipeline, the inlet oil way, the atmosphere balance hole and the oil discharge port are communicated with the radial roller bearing and the radial thrust ball bearing, the inlet oil way is respectively connected with the inlet oil pipe, the outlet oil way is respectively connected with the outlet oil pipe, and each atmosphere balance hole in the main bearing assembly is respectively connected with a communicating pipe and finally connected with the atmosphere balance pipe. Atmospheric balance pipe anterior segment be ascending notch cuttype design, be intercommunication each other between each atmospheric balance hole, main bearing assembly on also the design have platinum resistance hole, two sealed wind runner and two inlet flow ways of cooling air, main bearing assembly on axle sleeve and the centripetal roller bearing between the design have the oil scraper ring, simultaneously, the design has skeleton oil blanket and labyrinth seal between axle sleeve and the front bearing cap, the core section of thick bamboo bottom design of back stator assembly have the oil drain hole in certain aperture to back stator exit design has the steel pipe of certain size.

The beneficial effects of the utility model reside in that: the designed novel oil lubrication system is characterized in that the bearing is lubricated by adopting forced thin oil, and the problems of poor fluidity, large heat productivity of the bearing, poor heat dissipation, high temperature, short service life and the like of the traditional grease lubrication are solved by the oil lubrication mode. The designed main bearing assembly adopts a special sealing structure, has good sealing performance, prevents lubricating oil from leaking and the like in the running process of the fan, and the novel oil lubricating system is improved and designed on the basis of the traditional structure, and has the running conditions that the oil way inlet amount is 2-4L/min and the oil pressure is about 0.3MPa, so that the main bearing assembly and the novel oil lubricating system have interchangeability.

In addition, each atmosphere balance hole in the main bearing assembly is respectively connected with the communicating pipe and finally connected with the atmosphere balance pipe, and the atmosphere balance holes are communicated with each other, therefore, the existence of the atmosphere balance pipe maintains the balance between the pressure in the main bearing assembly and the external pressure, wherein the balance between the pressure between the radial roller bearing and the front bearing cover, the pressure between the radial roller bearing and the radial thrust ball bearing and the pressure between the radial thrust ball bearing and the rear bearing cover and the atmospheric pressure is maintained, and the arrangement mode of the front section of the atmosphere balance pipe is designed to be a rising ladder type and has a certain height difference, thereby avoiding the condition of lubricating oil siltation possibly occurring in the atmosphere balance pipe when the main shaft rotates at high speed. In addition, the bearing is generally cooled by air in the main bearing assembly, so that two cooling air circulation flow channels are designed in the main bearing assembly, and good cooling and sealing effects on the bearing are achieved. The main bearing assembly is also provided with two sealed air flow passages, so that smoke can be prevented from entering the bearing box and lubricating oil inside the main bearing assembly from leaking, the rear guide vane assembly has a better sealing design structure, the bottom of the core cylinder is provided with an oil discharge hole with a certain aperture, the outlet of the rear guide vane is provided with a steel pipe with a certain size, and when an oil return pipeline is pulled out during field maintenance, the lubricating oil can flow out from the oil discharge hole at the bottom of the core cylinder assembled by the rear guide vane and flows to the ground after passing through the designed outlet steel pipe, so that the maintenance in the field is facilitated.

To sum up, this adjustable axial fan of quiet leaf with novel oil lubricating system has not only guaranteed the safety and stability of fan under the high rotational speed operating condition, also has higher economic value to the user moreover.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is the schematic view of the main bearing assembly structure of the present invention.

FIG. 3 is a sectional view of the main bearing assembly structure A-A of the present invention.

FIG. 4 is a sectional view of the main bearing assembly structure B-B of the present invention.

FIG. 5 is a partial enlarged view of a cross-sectional view of the main bearing assembly structure B-B of the present invention.

Figure 6 is the utility model discloses main bearing assembly structure C-C cut-away view.

Figure 7 is the utility model discloses main bearing assembly structure D-D section view.

Fig. 8 is the utility model discloses back stator assembly structure sketch map.

Fig. 9 is a partial a-a sectional view of the rear guide vane assembly of the present invention.

In the drawings, corresponding technical features are labeled as follows:

1-motor, 2-intermediate shaft, 3-air inlet box, 4-large collector assembly, 5-adjustable front guide vane assembly, 6-small collector assembly, 7-machine shell assembly, 8-impeller, 9-main bearing assembly, 10-rear guide vane assembly, 11-cold air cover, 12-inlet oil pipe, 13-atmospheric balance pipe, 14-outlet oil pipe, 15-diffuser, 16-cold air pipeline assembly, 17-main shaft, 18-shaft sleeve, 19-front bearing cover, 20-bearing box, 21-oil retainer, 22-rear bearing cover, 23-oil outlet, W1-skeleton oil seal, W2-radial roller bearing and W3-radial thrust ball bearing.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples.

As shown in fig. 1-9, in the implementation of the present invention, at first, the motor 1, the intermediate shaft 2, the air inlet box 3, the large current collector assembly 4, the adjustable front guide vane assembly 5, the small current collector assembly 6, the casing assembly 7, the impeller 8, the main bearing assembly 9, the rear guide vane assembly 10, the cold air hood 11, the inlet oil pipe 12, the atmospheric balance pipe 13, the outlet oil pipe 14, the diffuser 15, the cold air pipeline assembly 16, etc. are installed, the motor 1 is started, the motor 1 drives the intermediate shaft 2 to make a rotational motion, the intermediate shaft 2 drives the impeller 8 to rotate and apply work to the air flow, the whole oil lubrication system 9, 12, 13, 14, etc. starts to operate, the air continuously cools and seals the bearing through the cold air pipeline 16, the air flow enters from the air inlet box 3, and sequentially passes through the large current collector assembly 4, the adjustable front guide vane assembly 5, the small current collector assembly 6, the impeller 8, the rear guide vane assembly 10, And a diffuser 15, finally completing the whole working process of the fan.

The inlet oil pipe 12, the atmosphere balance pipe 13 and the outlet oil pipe 14 are connected with the main bearing assembly 9, and the atmosphere balance pipe 13 connected with the atmosphere balance hole on the main bearing assembly 9 maintains the balance of the pressure inside the main bearing assembly 9 and the external pressure, wherein the balance of the pressure and the atmospheric pressure between the radial roller bearing W2 and the front bearing cover 19, between the radial roller bearing W2 and the radial thrust ball bearing W3, and between the radial thrust ball bearing W3 and the rear bearing cover 22 is maintained, and the arrangement mode of the front section of the atmosphere balance pipe 13 is in a rising step shape and has a certain height difference, so that the large amount of deposition of lubricating oil in the atmosphere balance pipe 13 caused by the high-speed rotation of the main shaft 17 is avoided. When the fan runs, 2-4L/min of lubricating oil is respectively conveyed to the inlet oil ways of the radial roller bearing W2 and the radial thrust ball bearing W3 through the inlet oil pipe 12 at set time, the inlet pressure of the lubricating oil is about 0.3MPa, and the lubricating oil rapidly flows in the inlet oil ways, so that the lubricating and cooling effects on the bearings are achieved. Two cooling air circulation flow channels are designed on the main bearing assembly 9, the heated radial roller bearing W2 and the radial thrust ball bearing W3 are well cooled and sealed through the cold air pipeline assembly 16, and a platinum thermal resistor temperature measuring hole is designed on the main bearing assembly 9 and used for measuring the bearing temperature at different moments and feeding back a user. If the main bearing assembly 9 contains an excessive amount of oil, it will flow out of the oil drain 23 and through the outlet oil pipe 14 and finally into the oil station.

An oil retainer 21 is arranged between a shaft sleeve 18 of the main bearing assembly 9 and a radial roller bearing W2, and a framework oil seal W1 and a labyrinth seal are arranged between the shaft sleeve 18 and a front bearing cover 19, so that the leakage of lubricating oil at the high rotating speed of the main shaft 17 is prevented. In addition, a narrow gap is formed between the impeller 8 mounted on the main bearing assembly 9 and the front bearing cover 19, and two sealed air flow channels are designed on the bearing box, so that not only can smoke be prevented from entering the bearing box 20, but also lubricating oil in the main bearing assembly 9 can be sealed. The rear guide vane assembly 10 has a better sealing design structure, an oil discharge hole with a certain aperture is designed at the bottom of the core cylinder, a steel pipe with a certain size is designed at the outlet of the rear guide vane, when a user overhauls on site, the outlet oil pipe 14 of the main bearing assembly 9 can be pulled out, lubricating oil flows out from the oil discharge hole at the bottom of the core cylinder of the rear guide vane assembly 10 and flows to the ground after passing through the designed outlet steel pipe, and the overhaul in the site is facilitated. The fixed blade adjustable axial flow fan with the novel oil lubricating system is applied to multiple plants at present, and the actual use condition shows that the fan is good in structure and high in economic value.

Claims (5)

1. The utility model provides an adjustable axial fan of quiet leaf with novel oil lubricating system, this fan comprises motor, jackshaft, inlet box, big collector assembly, adjustable front guide vane assembly, little collector assembly, casing assembly, impeller, main bearing assembly, back stator assembly, cold wind cover, import oil pipe, atmosphere balance pipe, export oil pipe, diffuser, the equipment of cold wind pipeline, its characterized in that: the main bearing assembly is provided with an inlet oil way, atmosphere balance holes, an oil discharge port and an oil return pipeline which are communicated with each other, wherein the inlet oil way and an inlet oil pipe of the radial roller bearing and the radial thrust ball bearing are respectively connected with each other, each atmosphere balance hole in the main bearing assembly is respectively connected with a communicating pipe and finally connected with the atmosphere balance pipe, the front section of the atmosphere balance pipe is in a rising ladder-shaped design, the atmosphere balance holes are mutually communicated, lubricating oil flowing from the inlet oil way can lubricate and cool the bearing, when the oil level is higher than the top of the oil discharge port, the lubricating oil enters the oil discharge port and finally flows out from the outlet oil pipe, the main bearing assembly is provided with a platinum thermal resistance hole for measuring the temperature of the bearing in operation, the main bearing assembly is also provided with two sealed air flow passages and two inlet flow passages for cooling air, the oil retainer ring is designed between the shaft sleeve assembled on the main bearing and the radial roller bearing, meanwhile, the framework oil seal and the labyrinth seal are designed between the shaft sleeve and the front bearing cover, the leakage of lubricating oil in operation is avoided in a better sealing mode, the rear guide vane assembly has a good design and assembly structure, the bottom of a core cylinder is designed with an oil discharge hole with a certain hole diameter, and the steel pipe with a certain size is designed at the outlet of the rear guide vane, so that the overhaul in the field is facilitated.

2. The axial flow fan with adjustable stationary blades having a novel oil lubrication system as claimed in claim 1, wherein: the oil lubrication system is forced thin oil lubrication.

3. The stationary blade adjustable axial flow fan with a novel oil lubrication system as claimed in claim 1 or 2, wherein: the main bearing assembly has high sealing performance.

4. The stationary blade adjustable axial flow fan with a novel oil lubrication system as claimed in claim 1 or 2, wherein: the atmosphere balance pipe is connected with the atmosphere balance hole of the main bearing assembly, the balance of pressure inside the main bearing assembly and outside is maintained, the front section arrangement mode of the atmosphere balance pipe is in a rising step type and has a certain height difference, a large amount of siltation of lubricating oil in the atmosphere balance pipe is prevented when the main shaft rotates at a high speed, and the balance of pressure inside and outside the main bearing assembly is ensured.

5. The stationary blade adjustable axial flow fan with a novel oil lubrication system as claimed in claim 1 or 2, wherein: the oil lubrication system can greatly reduce the operating temperature of the bearing and prolong the service life of the bearing.

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