CN209761761U - Hydraulic drive's mining axial-flow fan - Google Patents
Hydraulic drive's mining axial-flow fan Download PDFInfo
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- CN209761761U CN209761761U CN201920245967.4U CN201920245967U CN209761761U CN 209761761 U CN209761761 U CN 209761761U CN 201920245967 U CN201920245967 U CN 201920245967U CN 209761761 U CN209761761 U CN 209761761U
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- 238000005065 mining Methods 0.000 title claims abstract description 21
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- 238000009434 installation Methods 0.000 claims description 10
- 230000030279 gene silencing Effects 0.000 claims description 7
- 210000004907 gland Anatomy 0.000 claims description 6
- 230000000712 assembly Effects 0.000 claims description 5
- 238000000429 assembly Methods 0.000 claims description 5
- 238000009792 diffusion process Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 4
- 239000003921 oil Substances 0.000 abstract 4
- 239000010720 hydraulic oil Substances 0.000 abstract 1
- 238000009423 ventilation Methods 0.000 description 6
- 241000886569 Cyprogenia stegaria Species 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000002955 isolation Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000003584 silencer Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
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Abstract
The utility model discloses a hydraulic drive's mining axial-flow fan. The fan comprises an outer shell and an impeller, wherein a flow guide cover is arranged at the air inlet end of the fan; the hydraulic motor is connected with the motor support seat through a hydraulic oil pipe; the inner cylinder is fixedly connected to the inside of the outer shell through a radial rib plate, one end of the motor supporting seat is fixed to the end portion of the air inlet end of the inner cylinder through a bolt assembly, and the hydraulic motor is fixed to the other end portion of the motor supporting seat through the bolt assembly; the shaft extension end of the hydraulic motor extends into an inner hole of the motor supporting seat and then is connected with the adapter shaft through a flat key or a spline; the other end of the transfer shaft is connected with an impeller shaft hole through a flat key or a spline; the hydraulic motor is connected with an oil return pipe and an oil inlet pipe, and the oil return pipe and the oil inlet pipe are connected with the hydraulic station through a hydraulic control valve after penetrating through the outer shell. The utility model discloses compact structure, moment of torsion are big, light in weight, noise are low, longe-lived, maintenance convenience.
Description
Technical Field
The utility model belongs to the technical field of axial-flow fan, concretely relates to hydraulic drive's mining axial-flow fan.
Background
Among the ventilation apparatuses, the axial flow fan is generally driven by a motor. The axial flow fan is mainly structurally characterized in that a motor is axially arranged in a shell, and an impeller is fixed on a motor shaft extension to form a cantilever support. Because the weight of the impeller is large, in the actual operation process, the radial load and the axial load exist, so that the bearing stress condition of the shaft extension end of the motor is poor. In addition, the lubrication condition of the bearing is not ideal, and the phenomena that the motor bearing is burnt out and worn out prematurely and the motor is burnt out are frequently caused.
The factors such as installation, operation, maintenance of the motor and the like are considered, the structural strength of the motor installation seat and the ventilation and heat dissipation requirements of the motor installation seat are considered, the length of the cylinder of the fan is generally a little longer than that of the motor, and the length of the whole fan is larger.
in coal mines and other occasions with explosive gases, the matched motor is required to have explosion-proof performance. The manufacturing cost of the motor with special purpose is 20-40% higher than that of the common motor. Therefore, the manufacturing cost of the mining axial flow fan is greatly improved. To avoid contact between the motor and the explosive gas in the flow channel, the motor needs to adopt an isolation chamber. After the isolation cavity is adopted, the heat dissipation performance of the motor is influenced, so that a ventilation pipe is necessary to be arranged. After the ventilation pipe and the isolation cavity are adopted, a plurality of components are arranged in the flow channel, the resistance is large, and the efficiency of the fan is low. The difficulty of installing and maintaining the motor which is hermetically installed in the isolation cavity is also quite large.
In the process of mining of a mine and excavating of a tunnel, a heading machine or a shield machine is mostly adopted, power sources of mechanisms such as walking and cutting of the heading machine and the shield machine are all provided by a vehicle-mounted hydraulic station, in the design of the hydraulic station, the possibility that all the mechanisms work simultaneously is considered for output power, the allowance of the hydraulic station is large, and the surplus power output cannot be fully utilized. However, the dust removal fans of the heading machine and the shield machine are driven by the motor.
In some occasions, the installation position of the fan is limited, the driving mode of the fan is changed, the installation size of the fan is reduced, and a hydraulic driving structure is adopted, so that the fan is a good choice.
Disclosure of Invention
The utility model aims to provide a compact structure, moment of torsion are big, light in weight, noise are low, longe-lived, maintain convenient hydraulic drive's mining axial fan to axial fan in the use, the operational environment of motor is poor and the bearing atress situation is bad and overhaul to maintain inconvenient, installation space limited scheduling problem.
The purpose of the utility model is realized through the following technical scheme: the hydraulically-driven axial flow fan for the mine comprises a shell and an impeller, wherein a flow guide cover is arranged at the air inlet end of the fan; the hydraulic motor is connected with the motor support seat through a hydraulic motor; the inner cylinder is fixedly connected to the inside of the outer shell through a radial rib plate, one end of the motor supporting seat is fixed to the end part of the air inlet end of the inner cylinder through a bolt assembly, and the hydraulic motor is fixed to the other end of the motor supporting seat through the bolt assembly; the shaft extension end of the hydraulic motor extends into an inner hole of the motor supporting seat and then is connected with the adapter shaft through a flat key or a spline; the other end of the transfer shaft is connected with an impeller shaft hole through a flat key or a spline; the hydraulic motor is connected with an oil return pipe and an oil inlet pipe, and the oil return pipe and the oil inlet pipe are connected with the hydraulic station through a hydraulic control valve after penetrating through the outer shell.
Specifically, the outer shell comprises an outer cylinder and a perforated plate cylinder, and the outer cylinder, the perforated plate cylinder, the inner cylinder and the bearing box are combined in a concentric nested manner from outside to inside; a silencing material is filled between the outer cylinder and the perforated plate cylinder, and flanges are arranged at two ends of the outer cylinder and the perforated plate cylinder; the inner cylinder body is a component formed by nesting and connecting an inner cylinder body and an outer cylinder body through radial uniformly distributed radial rib plates, the outer cylinder body is also nested and connected with the perforated plate cylinder body of the outer shell body through the radial uniformly distributed radial rib plates, and the inner cylinder body forms a bearing box; an annular plate is arranged on one side of the air inlet end of the inner cylinder body and is connected with the end parts of the inner cylinder body and the outer cylinder body, and a plurality of bolt holes corresponding to the bolt assembly hole positions on the mounting flange of the motor supporting seat are arranged on the annular plate.
Specifically, one end of the adapter shaft, which is connected with the hydraulic motor, is an inner hole with a key slot or a spline slot, and one end of the adapter shaft, which is connected with the impeller, is a shaft neck with a key slot or a spline slot; the shaft shoulders at the two sides of the adapter shaft are provided with bearings in the bearing box; the bearing outer end close to one side of the impeller is provided with a gland and is fixed at the end part of the inner cylinder body through a bolt, the inner end surface of the gland is provided with a hollowed-out flange with the outer diameter matched with the aperture of the bearing box, the end surface of the flange is contacted with the outer end surface of the bearing close to one side of the impeller, and an oil seal is arranged in a groove formed by the hollowed-out part of the flange, the outer end surface of the bearing and the outer diameter surface of the adapter shaft.
Specifically, the motor supporting seat is of a cylinder structure with one end part provided with a mounting flange, holes corresponding to bolt holes in an annular plate of the inner cylinder are uniformly distributed in the flange, and holes corresponding to bolt assembly hole positions in the mounting flange at the end part of the hydraulic motor are distributed in the other end part of the motor supporting seat; and a hollow flange with the outer diameter matched with the aperture of the bearing box is arranged on the side surface of the flange, the end surface of the flange is contacted with the outer end surface of the bearing close to one side of the hydraulic motor, and an oil seal is arranged in a groove formed by the hollow part of the flange, the outer end surface of the bearing and the outer diameter surface of the adapter shaft.
Specifically, the air guide cover is arranged outside the hydraulic motor, or is in a thin-wall hemispherical shape or a semi-closed conical cylinder shape, and the open end of the air guide cover is fixed on the end face of the inner cylinder body.
Furthermore, a silencing diffusion cylinder is arranged at the air outlet end of the fan.
Meanwhile, two or more than two hydraulically-driven mining axial flow ventilators with the same specification form a disrotatory structure or a multi-stage structure; when the two mining axial-flow ventilators form the combined ventilator with the contra-rotating structure, the impellers of the two mining axial-flow ventilators are installed adjacently, the number of the blades of the two impellers is different, the angles of the blades are different, and the rotating directions of the impellers are opposite.
The utility model discloses a hydraulic motor replaces the motor for mining axial fan is utilizing current hydraulic system or is used for driving large-scale fan, and the effect is obvious, and its beneficial effect embodies as follows:
(1) The surplus power of the existing hydraulic station is supplied to the hydraulic motor for driving through a pipeline and a control valve, so that the control scheme of the whole system has a better optimization effect, and meanwhile, the energy conservation is facilitated. In some occasions, such as a large fan, even if no existing hydraulic system exists, the hydraulic station is independently matched with the fan, and the overall manufacturing cost and the service performance of the hydraulic station also have great advantages.
(2) Small volume and light weight. The volumetric power ratio of the hydraulic motor is much smaller than that of the electric machine. Thus, the fan has a smaller overall size, typically the liquid driven fan is reduced in length by more than 1/3 compared to the electrically driven fan, and the same power liquid driven fan is 1/2-1/5 for the electrically driven fan in terms of its weight.
(3) Stepless speed regulation under constant torque is easy to realize, and a speed regulation system can be saved. The fan has stronger capability of bearing impact load.
(4) The hydraulic self-locking device is provided, and a brake device can be omitted under the general condition.
(5) The noise is low. The hydraulic motor has no electromagnetic noise, and is lower than the noise driven by the motor by more than 10dB (A).
(6) High working reliability and long service life. The utility model discloses in, between impeller and the motor, adopt the switching axle. The transfer shaft is supported by the bearing box, and the impeller is not directly arranged on the motor shaft, so that the stress condition is fundamentally improved. Normally, hydraulic motor drives have a lifetime of at least 10 ten thousand hours, whereas electric motor drives for a maximum of 5 ten thousand hours.
(7) The installation and the maintenance are convenient. Because the weight and the overall dimension of the fan are greatly reduced, the fan brings greater convenience to installation and transportation. The hydraulic motor replaces a motor, the motor is not installed in the flow channel any longer, the possibility of damage and burnout is avoided, and the maintenance workload is greatly reduced.
(8) The efficiency of the fan is improved. Because the motor does not need to be installed in the flow channel, the flow channel is more smooth. The length of the fan is reduced, and the flow channel is also shortened, so that the airflow resistance is greatly reduced, and the efficiency of the fan is correspondingly improved.
Drawings
fig. 1 is a vertical sectional view of embodiment 1 of the present invention.
Fig. 2 is a left side view of fig. 1.
Fig. 3 is an enlarged view at i in fig. 1.
Fig. 4 is an elevational cross-sectional view of the outer housing and inner barrel of fig. 1.
Fig. 5 is a left side view of fig. 4.
Fig. 6 is a right side view of fig. 4.
Fig. 7 is an elevational cross-sectional view of the motor support base of fig. 1.
Fig. 8 is a vertical sectional view of embodiment 2 of the present invention.
Fig. 9 is a schematic elevation structure diagram of a large axial flow fan in accordance with embodiment 3 of the present invention, which is hydraulically driven.
Fig. 10 is the supporting structure schematic diagram of the liquid driving fan and the hydraulic station of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example 1:
Referring to fig. 1 to 7, the hydraulically-driven axial flow fan for the mine of the embodiment comprises an outer shell 3 and a primary impeller 9, wherein a flow guide sleeve 1 is arranged at an air inlet end of the fan; it also includes inner cylinder 305, hydraulic motor 2, motor support 5, transfer shaft 8. As can be seen from fig. 1, the air guide sleeve 1 is disposed outside the hydraulic motor 2, the air guide sleeve is either a thin-wall hemisphere shape or a semi-closed cone shape, the air guide sleeve 1 of the present embodiment is a thin-wall hemisphere shape, and the open end of the air guide sleeve 1 is fixed on the left end surface of the inner cylinder 305; the fan air-out end of this embodiment also is equipped with the kuppe, for the semi-closed cone cylindric of thin wall. The inner cylinder body 305 is fixedly connected to the inside of the outer shell 3 through a radial rib plate 306, the right end of the motor supporting seat 5 is fixed to the end part of the air inlet end at the left end of the inner cylinder body 305 through a bolt assembly 19, and the hydraulic motor 2 is fixed to the left end of the motor supporting seat 5 through a bolt assembly 4; the shaft extension end at the right end of the hydraulic motor 2 extends into an inner hole of the motor supporting seat 5 and then is connected with the left end of the adapting shaft 8 through a flat key; the transfer shaft 8 is fixed in a bearing box 308 of the inner cylinder body 305, which is positioned at the geometric center of the outer shell 3, through a left bearing 7 and a right bearing 7, and the right end of the transfer shaft 8 is connected with the shaft hole of the first-stage impeller 9 through a flat key; the hydraulic motor 2 is connected with an oil return pipe 18 and an oil inlet pipe 17, and the oil return pipe 18 and the oil inlet pipe 17 are connected with a hydraulic station (not shown in fig. 1) through a hydraulic control valve after passing through the outer shell 3.
As can be seen from fig. 1, 2, 4, 5 and 6, the outer shell 3 comprises an outer cylinder 302 and a perforated plate cylinder 304, and the outer cylinder 302, the perforated plate cylinder 304 and an inner cylinder 305 are concentrically nested and combined from outside to inside with a bearing box 308; a silencing material 303 is filled between the outer cylinder 302 and the porous plate cylinder 304, and flanges 301 are arranged at two ends of the outer cylinder 302 and the porous plate cylinder 304; the inner cylinder body 305 is a member formed by nesting and connecting an inner cylinder body and an outer cylinder body through radial rib plates 307 which are uniformly distributed in the radial direction, the outer cylinder body is also nested and connected with the porous plate cylinder body 304 of the outer shell 3 through radial rib plates 306 which are uniformly distributed in the radial direction, and the inner cylinder body forms a bearing box 308; an annular plate 309 is arranged on the left side of the air inlet end of the inner cylinder body 305 and connected with the left end parts of the inner cylinder body and the outer cylinder body of the inner cylinder body 305, and eight bolt holes corresponding to the hole positions of the bolt assemblies 19 on the mounting flange at the right end of the motor supporting seat 5 are arranged on the annular plate 309. In this embodiment, the perforated plate cylinder 304 is an inner guard plate of the sound damper, and when the sound damper is in different forms, the perforated plate cylinder 304 is configured accordingly or eliminated. In this embodiment, the cross section of the inner cylinder 305 is cylindrical, and may be conical according to actual needs.
As can be seen from fig. 1 and 3, the left end of the connection between the adapter shaft 8 and the hydraulic motor 2 is an inner hole with a key groove, and the right end of the connection between the adapter shaft and the first-stage impeller 9 is a shaft neck with a key groove; bearings 7 are arranged on shaft shoulders at two sides of the adapter shaft 8 and are arranged in the bearing box 308; a gland 20 is arranged at the outer end of the bearing 7 close to one side of the primary impeller 9 and is fixed at the right end part of the inner cylinder body 305 through a bolt assembly 21, a hollow flange with the outer diameter matched with the aperture of the bearing box 308 is arranged at the inner end face of the gland 20, the left end face of the flange is contacted with the outer end face of the bearing 7 close to one side of the primary impeller 9, and a framework oil seal 6 is arranged in a groove formed by the hollow part of the flange, the outer end face of the bearing 7 and the outer diameter face of the adapter shaft 8.
As can be seen from fig. 1 and 7, the motor supporting seat 6 is a cylinder structure with a mounting flange at the right end, holes corresponding to the hole positions of the bolt assemblies 19 on the annular plate 309 at the left end of the inner cylinder 305 are uniformly distributed on the flange, and holes corresponding to the hole positions of the bolt assemblies 4 on the mounting flange at the right end of the hydraulic motor 2 are distributed at the left end of the motor supporting seat 6; the right side surface of the motor supporting seat 6, which is a right end flange, is provided with a hollowed flange with the outer diameter matched with the aperture of the bearing box 308, the right end surface of the flange is contacted with the outer end surface of the bearing 7 close to one side of the hydraulic motor 2, and a skeleton oil seal 6 is arranged in a groove formed by the hollowed part of the flange, the outer end surface of the bearing 7 and the outer diameter surface of the adapter shaft 8.
As shown in fig. 1, a silencing diffuser 16 is disposed at the air outlet end of the right end of the blower. Certainly, the silencer can be connected to the front end and the rear end of the fan shell, or the silencer or the silencing diffuser can be connected to the front end or the rear end of the fan shell independently, or the silencer can be omitted before or behind the fan shell, and the connection between the fan shell and the silencer is matched according to silencers with different structural forms.
In fig. 1, 10 is an axial end retaining ring.
Example 2:
Referring to fig. 8, the present embodiment is a vertical sectional view of a combined ventilator with a contra-rotating structure, which is composed of two hydraulic-driven axial fans for mines as shown in embodiment 1 and fig. 1. The hydraulic drive's mining axial-flow fan makes up into the combined ventilation blower of disrotatory structure and multilevel structure by two and more than the same specification the utility model discloses hydraulic drive's combined ventilation blower. As shown in fig. 8, when the combination type ventilator having the counter-rotating structure is composed of two axial-flow ventilators, the impellers of the two ventilators are installed adjacent to each other, and the impellers of the two ventilators have different numbers of blades, different blade angles, and opposite rotating directions. In fig. 8, 9 denotes a primary impeller, 11 denotes a secondary impeller, 12 denotes a 1 st flat key, 14 denotes a 2 nd flat key, and 15 denotes an outlet diffuser. The remaining reference numerals in fig. 8 have the same meaning as those denoted by the same reference numerals in fig. 1 of embodiment 1.
Example 3:
referring to fig. 9, the present embodiment is a schematic structural diagram of a large axial flow fan. In the embodiment, the axial flow fan is a mining main fan with a contra-rotating structure, and the lower end of the shell is additionally provided with a support leg structure or other support structures; the hydraulic motor also adopts an axial plunger hydraulic motor, but the hydraulic motor is only one mode of the hydraulic motor, and in practical application, other structural forms can be adopted.
As can be seen from fig. 9, the inner cylinder of the right rear stage axial-flow fan is a conical cylinder, the outer casing of the conical cylinder is used as a diffusion cylinder or a part of the diffusion cylinder, and the connecting oil pipe of the hydraulic motor is arranged below, which is a special example, and can be in other directions.
Referring to fig. 10, it is the supporting structure schematic diagram of the liquid driving fan and the hydraulic station of the present invention. One or more hydraulically driven axial fans 23 are connected to a hydraulic station 25 via connecting oil pipes 24 and hydraulic control devices 26, i.e. hydraulic control valves. The hydraulic station 25 can be an existing hydraulic system of a matched device or a specially matched hydraulic station, and the structural form and the power capacity of the hydraulic station 25 are selected according to actual needs.
It should be understood that the drawings and the description are only intended to illustrate the structure of the present invention. To the specific embodiments described in the present invention, as long as the principle is the same or similar, the local structure is modified, supplemented, or replaced by similar methods, and all shall belong to the protection scope of the present invention.
Claims (7)
1. A hydraulically-driven axial flow fan for a mine comprises a shell and an impeller, wherein a flow guide cover is arranged at the air inlet end of the fan; the method is characterized in that: the hydraulic motor is connected with the motor support seat through a hydraulic motor; the inner cylinder is fixedly connected to the inside of the outer shell through a radial rib plate, one end of the motor supporting seat is fixed to the end part of the air inlet end of the inner cylinder through a bolt assembly, and the hydraulic motor is fixed to the other end of the motor supporting seat through the bolt assembly; the shaft extension end of the hydraulic motor extends into an inner hole of the motor supporting seat and then is connected with the adapter shaft through a flat key or a spline; the other end of the transfer shaft is connected with an impeller shaft hole through a flat key or a spline; the hydraulic motor is connected with an oil return pipe and an oil inlet pipe, and the oil return pipe and the oil inlet pipe are connected with the hydraulic station through a hydraulic control valve after penetrating through the outer shell.
2. The hydraulically driven mining axial fan of claim 1, wherein: the outer shell comprises an outer cylinder and a perforated plate cylinder, and the outer cylinder, the perforated plate cylinder, the inner cylinder and the bearing box are combined in a concentric nested manner from outside to inside; a silencing material is filled between the outer cylinder and the perforated plate cylinder, and flanges are arranged at two ends of the outer cylinder and the perforated plate cylinder; the inner cylinder body is a component formed by nesting and connecting an inner cylinder body and an outer cylinder body through radial uniformly distributed radial rib plates, the outer cylinder body is also nested and connected with the perforated plate cylinder body of the outer shell body through the radial uniformly distributed radial rib plates, and the inner cylinder body forms a bearing box; an annular plate is arranged on one side of the air inlet end of the inner cylinder body and is connected with the end parts of the inner cylinder body and the outer cylinder body, and a plurality of bolt holes corresponding to the bolt assembly hole positions on the mounting flange of the motor supporting seat are arranged on the annular plate.
3. The hydraulically driven mining axial fan of claim 2, characterized in that: one end of the adapter shaft, which is connected with the hydraulic motor, is an inner hole with a key slot or a spline slot, and one end of the adapter shaft, which is connected with the impeller, is a shaft neck with a key slot or a spline slot; the shaft shoulders at the two sides of the adapter shaft are provided with bearings in the bearing box; the bearing outer end close to one side of the impeller is provided with a gland and is fixed at the end part of the inner cylinder body through a bolt component, the inner end surface of the gland is provided with a hollowed-out flange with the outer diameter matched with the aperture of the bearing box, the end surface of the flange is contacted with the outer end surface of the bearing close to one side of the impeller, and an oil seal is arranged in a groove formed by the hollowed-out part of the flange, the outer end surface of the bearing and the outer diameter surface of the adapter shaft.
4. The hydraulically driven mining axial fan of claim 3, wherein: the motor supporting seat is of a cylinder structure with one end part provided with an installation flange, holes corresponding to the hole positions of the bolt assemblies on the annular plate of the inner cylinder are uniformly distributed on the flange, and holes corresponding to the hole positions of the bolt assemblies on the installation flange at the end part of the hydraulic motor are distributed at the other end part of the motor supporting seat; and a hollow flange with the outer diameter matched with the aperture of the bearing box is arranged on the side surface of the flange, the end surface of the flange is contacted with the outer end surface of the bearing close to one side of the hydraulic motor, and an oil seal is arranged in a groove formed by the hollow part of the flange, the outer end surface of the bearing and the outer diameter surface of the adapter shaft.
5. The hydraulically driven mining axial fan of claim 1, wherein: the flow guide cover is arranged outside the hydraulic motor, or is in a thin-wall hemispherical shape or a semi-closed conical cylinder shape, and the open end of the flow guide cover is fixed on the end face of the inner cylinder body.
6. The hydraulically driven mining axial fan of claim 1, wherein: the air outlet end of the fan is provided with a silencing diffusion cylinder.
7. The hydraulically driven mining axial fan of claim 1, wherein: two or more hydraulically-driven mine axial flow ventilators with the same specification are combined into a disrotatory structure or a multi-stage structure; when the two mining axial-flow ventilators form the combined ventilator with the contra-rotating structure, the impellers of the two mining axial-flow ventilators are installed adjacently, the number of the blades of the two impellers is different, the angles of the blades are different, and the rotating directions of the impellers are opposite.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920245967.4U CN209761761U (en) | 2019-02-27 | 2019-02-27 | Hydraulic drive's mining axial-flow fan |
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| CN201920245967.4U CN209761761U (en) | 2019-02-27 | 2019-02-27 | Hydraulic drive's mining axial-flow fan |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109707645A (en) * | 2019-02-27 | 2019-05-03 | 平安电气股份有限公司 | A kind of Coal Mine Axial Flow Fan of hydraulic-driven |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109707645A (en) * | 2019-02-27 | 2019-05-03 | 平安电气股份有限公司 | A kind of Coal Mine Axial Flow Fan of hydraulic-driven |
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