WO2016078199A1

WO2016078199A1 - Transmission apparatus for contra-rotating impeller ventilation

Info

Publication number: WO2016078199A1
Application number: PCT/CN2015/000799
Authority: WO
Inventors: 寇子明; 达善荣; 卫进; 高贵军; 李婷; 李胜
Original assignee: 太原理工大学
Priority date: 2014-11-22
Filing date: 2015-11-19
Publication date: 2016-05-26
Also published as: CN104482117B; AU2015349532A1; CN104482117A; AU2015349532B2

Abstract

A transmission apparatus for contra-rotating impeller ventilation. According to the apparatus, flanges (13, 21) output to a first-stage impeller (14) and a second-stage impeller (18) to achieve contra-rotation of the impellers; tapered roller bearings (20) are arranged at both ends of a cross shaft (9) and can run at a high speed, so that the requirement on high rotating speed of the impellers can be met. The apparatus is a keel type transmission case, the cross shaft is used as the main body, and the case only bears a supporting force on the longitudinal shaft end of the cross shaft; therefore, the two sets of blades are closest to each other under a bevel gear transmission condition, so that the structure is more compact and the efficiency of a contra-rotating impeller ventilation device is improved.

Description

Counter-rotating impeller ventilation transmission device

Technical field

The invention relates to a ventilation transmission device, in particular to a technical solution suitable for a contra-rotating impeller ventilation device.

Background technique

The reasonable ventilation system uses ventilation power to provide sufficient fresh air to each wind location in the most economical way, providing suitable temperature and humidity, maintaining good climatic conditions to ensure the safety of personnel and improve the environment. need. The quality of ventilation equipment has a significant impact on ventilation.

Most of the existing counter-rotating impeller ventilators use two-stage impellers driven by two motors of equal capacity, equal rotational speed, and opposite rotational directions. The main problems are as follows: First, the motor is placed in the air cylinder together with the impeller, and the annular passage formed between the impeller/motor and the main air cylinder has a great influence on the straightness of the airflow, so that the influence on the performance of the swirling impeller ventilation equipment is also very high. Big. Second, the motor and the impeller are directly connected, and are fixed in the air cylinder. The heat dissipation condition of the motor is relatively placed in the free atmosphere, and the effect is poor, and the maintenance is not convenient.

A prior art that can be obtained is disclosed as "a spiral bevel gear reversing box" of 203463562 U, the reversing box comprising a first output shaft, a second output shaft, an input shaft, and a spiral bevel gear. The first output shaft and the second output shaft are respectively disposed perpendicular to the input shaft. During operation, while the input shaft rotates, the first output shaft and the second output shaft are driven to complete the reverse rotation. Due to its large size and complex structure, it is not suitable for use in a counter-rotating ventilator with a compact structure. Therefore, it is particularly important to develop a transmission suitable for a counter-rotating impeller.

Summary of the invention

The object of the present invention is to provide a counter-rotating impeller ventilation transmission device, which is used to solve the problems of poor performance, poor heat dissipation and inconvenient maintenance of the existing counter-rotating impeller ventilation equipment. And under the condition of bevel gear transmission, the two sets of blades can be closest to each other, thereby improving the efficiency of the contra-rotating impeller ventilation equipment.

In order to achieve the above object, the technical solution of the present invention is: a counter-rotating impeller transmission device, including a cross shaft, a bushing, a flange, a bevel gear shaft and the like of the transmission device, characterized in that: the axial end and the longitudinal end of the cross shaft Spiral bevel gears are provided, and the distance between the two sets of blades is the closest under the condition of bevel gear transmission.

By adopting the above technical solution, the rotation of the cross shaft simultaneously drives the rotation of the spiral bevel gear, completes the reversing rotation of the transmission device, and improves the efficiency of the ventilation device of the counter-rotating impeller.

The flanges are respectively output to the first-stage impeller and the second-stage impeller to realize the counter-rotating rotation of the impeller.

Both ends of the cross shaft are provided with tapered roller bearings. By adopting the above technical solution, the tapered roller bearing is adopted, the bearing can withstand high speed operation, and the high rotation speed requirement of the impeller can be satisfied.

The invention relates to a keel type transmission box, which has a cross shaft as a main body, and the box body only bears the supporting force of the longitudinal shaft end of the cross shaft. Therefore, the present invention has the effects of simpler and more compact structure and high transmission efficiency.

The invention relates to a counter-rotating impeller transmission device, which solves the defects of poor performance, poor heat dissipation and inconvenient maintenance of the existing counter-rotating impeller ventilation equipment. And under the condition of bevel gear transmission, the two groups of impellers can be closest to each other, thereby achieving a more compact structure and improving the efficiency of the counter-rotating impeller ventilation equipment. Through the flange output to the first-stage impeller and the second-stage impeller, the counter-rotating rotation of the impeller is realized. Tapered roller bearings are provided at both ends of the cross shaft, and the bearing can withstand high speed operation, and the high speed requirement of the impeller can be satisfied. The invention relates to a keel type transmission box, which has a cross shaft as a main body, and the box body only bears the supporting force of the longitudinal shaft end of the cross shaft. Therefore, the present invention has the effects of simpler and more compact structure and high transmission efficiency.

DRAWINGS

Figure 1 is an overall schematic view of the present invention.

Figure 2 is a schematic view of the structure of the present invention.

Figure 3 is a schematic view of the structure of the present invention taken along the line A-A of Figure 2;

In the figure: 1, motor; 2, cross-shaft universal coupling; 3, first-stage impeller; 4, counter-rotating impeller transmission; 5, secondary impeller; 6, air duct; 7, cross-shaft universal Coupling; 8, deep groove ball bearing; 9, cross shaft; 10, oil seal; 11, plum coupling; 12, bolt; 13, flange I; 14, first stage impeller; 15, end cover; Ventilation bolt; 17, flat key; 18, secondary impeller; 19, spiral bevel gear I; 20, tapered roller bearing; 21, flange II; 22, spiral bevel gear III; 23, bevel gear shaft; Oil bolt; 25, spiral bevel gear II; 26, flat key; 27, bushing; 28, round nut; 29, tapered roller bearing; 30, air cylinder.

detailed description

The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings, so that those skilled in the art can.

As shown in Fig. 1, Fig. 2 and Fig. 3, a counter-rotating impeller ventilation transmission is provided, which comprises a cross shaft 9, a sleeve 27, a flange I 13 and a bevel gear shaft of the transmission, the relationship of which is The contra-rotating impeller ventilation transmission device is mainly composed of a cross shaft 9 and adopts a keel type transmission box body, and the box body supports the longitudinal shaft end of the cross shaft. The designed cross shaft 9 is provided with a tapered roller bearing 20 at both ends, a spiral bevel gear II 25 and a spiral bevel gear III22 at the axial end of the cross shaft 9, and a spiral bevel gear I 19 at the longitudinal end; The designed spiral bevel gear I 19 meshes with the spiral bevel gear II 25 and the spiral bevel gear III22 respectively; the flange I 13 is output to the first-stage impeller 14, and the flange 21 is output to the secondary impeller 18 to realize the impeller pair Rotary rotation, and under the condition of bevel gear transmission, the distance between the two sets of blades is the closest. This kind of structure is compact in design and small in space. It is designed for the narrow space structure of coal mines. It has strong practicability and ventilation with existing underground coal mines. Compared with the equipment, it has the characteristics of small size, compact structure and high ventilation efficiency.

Further implementation is as follows:

As shown in Fig. 1, the motor 1 is used as a power source, transmitted through the cross shaft type universal joint 2, and transmits power to the first stage impeller 3, and then the counter impeller drive unit 4 drives the second stage impeller 5 to realize the impeller. The counter-rotation.

As shown in FIG. 2 and FIG. 3, the present invention is a counter-rotating impeller transmission device, including a cross shaft 9, a bushing 27, a flange 13, a bevel gear shaft 23, etc. of the transmission device, and the structural relationship thereof is: a cross shaft 9 The axial end is provided with a spiral bevel gear II25, a spiral bevel gear III22, and a longitudinal end is provided with a spiral bevel gear I19. The spiral bevel gears I19 mesh with the spiral bevel gears II25 and the spiral bevel gears III22, respectively. While implementing the bevel gear transmission, the closer the distance between the two sets of blades is designed, the more compact the structure is.

The flange 13 is output to the first-stage impeller 14, and the flange 21 is output to the secondary impeller 18 to realize the counter-rotating rotation of the impeller.

The tapered shaft 9 is provided with tapered roller bearings 20 at both ends. By adopting the above technical solution, the tapered roller cone bearing is adopted, the bearing can withstand high speed operation, and the high rotation speed requirement of the impeller can be satisfied.

The invention relates to a keel type transmission box, which has a cross shaft as a main body, and the box body only bears the supporting force of the longitudinal axis of the cross shaft. Therefore, the present invention has the effects of simpler and more compact structure and high transmission efficiency.

Claims

A counter-rotating impeller ventilation transmission device, comprising a cross shaft, a bushing, a flange and a bevel gear shaft of the transmission device, characterized in that: the spiral shaft gear (II) is provided at an axial end of the cross shaft (9), The spiral bevel gear III (22) is provided with a spiral bevel gear I (19) at a longitudinal end; the spiral bevel gear I (19) is meshed with the spiral bevel gear II (25) and the spiral bevel gear III (22), respectively. Under the condition of bevel gear transmission, the distance between the two groups of blades is the closest.
The counter-rotating impeller ventilation transmission device according to claim 1, wherein the flange (13) outputs to the first-stage impeller (14) and the flange (21) to the secondary impeller (18). The counter-rotating rotation of the impeller is achieved.
A counter-rotating impeller ventilation transmission according to claim 1, characterized in that both ends of the cross shaft (9) are provided with tapered roller bearings (20).
The counter-rotating impeller ventilation transmission device according to claim 1, wherein the counter-rotating impeller ventilation transmission device is a keel-type transmission housing, and the cross shaft is mainly used, and the box body only bears the longitudinal shaft end of the cross shaft. Supporting force.