WO2020124981A1

WO2020124981A1 - Integrated centrifugal fan set having high maintainability

Info

Publication number: WO2020124981A1
Application number: PCT/CN2019/093309
Authority: WO
Inventors: 王本义; 任晶; 易铁航; 安然; 李沃原
Original assignee: 中车大连机车研究所有限公司
Priority date: 2018-12-17
Filing date: 2019-06-27
Publication date: 2020-06-25
Also published as: CN109340157A

Abstract

An integrated centrifugal fan set having high maintainability, comprising a flow concentrator (1), a centrifugal impeller (2), a mounting rack (3), and a motor (4). The motor (4) is fixed on the mounting rack (3). The centrifugal impeller (2) is mounted on an output shaft (41) of the motor (4). The flow concentrator (1) is fixed on the mounting rack (3) and disposed at the front end of the centrifugal impeller (2). Said fan set further comprises a sliding rail (5) and a T-shaped bolt (6). The sliding rail (5) is provided with a T-shaped sliding groove (50) extending in the length direction thereof. The mounting rack (3) is mounted in the T-shaped sliding groove (50) by means of the T-shaped bolt (6).

Description

High-maintenance integrated centrifugal ventilation unit

Technical field

The invention relates to the technical field of centrifugal fans, in particular to a high-maintenance integrated centrifugal fan unit.

Background technique

With the development of economy, the speed of trains is getting faster and faster. As the train speeds up, it places higher demands on the weight, noise, volume and maintainability of each component. As an important part of the cooling unit, the centrifugal ventilation unit has an important role in its performance. The existing centrifugal ventilation unit is directly installed on the locomotive through bolts. When installing the centrifugal ventilation unit or when the centrifugal ventilation unit needs to be disassembled from the locomotive for maintenance, the bolts used for fixing need to be completely removed, resulting in its installation or disassembly The process consumes a lot of time. At the same time, when directly fixed with bolts, it is necessary to accurately align the fixing hole on the mounting frame with the threaded hole, which is not convenient for installation.

Summary of the invention

In view of the above problems, the present invention proposes a high-maintenance integrated centrifugal ventilation unit. The centrifugal ventilation unit can be easily installed on or removed from the locomotive.

The technical means adopted by the present invention are as follows:

A high-maintenance integrated centrifugal ventilation unit includes a current collector, a centrifugal impeller, a mounting frame and a motor, the motor is fixed on the mounting frame, the centrifugal impeller is mounted on the output shaft of the motor, and the current collector is fixed on The mounting frame is placed on the front end of the centrifugal impeller, and also includes a slide rail and a T-shaped bolt. The slide rail is provided with a T-shaped chute extending along its length. The mounting frame is installed on the T-shaped slide through the T-shaped bolt. In the slot

Further, the T-shaped chute includes a screw accommodating groove and a clamping groove, and there are two sliding surfaces in the clamping groove, the two sliding surfaces are oppositely arranged with the center line of the T-shaped chute as a symmetry axis, and the sliding surface Inclined with the center line of the T-shaped chute so that the depth of the card slot gradually increases in the direction along the center line of the T-shaped chute to both sides,

The T-bolt includes a head and a screw, the head is fixed at one end of the screw, an end surface of the head with the screw is provided with a clamping surface having the same angle as the sliding surface, and the screw is provided There is a fixing nut for fixing the T-bolt and the mounting bracket;

Further, a shock absorber is also provided between the mounting bracket and the fixing nut;

Further, one end of the mounting frame on which the current collector is fixed has a mounting plate, the mounting surface of the current collector is provided with a groove, and a sealing rubber strip is provided in the groove;

Further, the centrifugal impeller includes a front disc, a backward blade, a rear disc, and an axle disc. The front disc, the backward blade, and the rear disc are welded together, and the axle disc and the rear disc are connected by bolts. The rear disc has a forward A conical groove recessed on one side of the disk, when the motor is connected to the centrifugal impeller, the front end of the motor is placed in the conical groove;

Further, the cone angle of the tapered groove is 152° to 156°;

Further, the front disc has a plurality of slots distributed uniformly in the circumferential direction, the slots are rectangular, and the backward blades are inserted into the slots and welded and fixed;

Further, the output shaft of the motor is a tapered shaft, and the front end of the tapered shaft has a left-hand thread, and the screw direction is opposite to that of the impeller;

Further, water leakage openings are provided on the upper and lower sides of the front and rear ends of the motor.

Compared with the prior art, the high-maintenance integrated centrifugal ventilation unit of the present invention has the following beneficial effects: 1. The centrifugal ventilation unit also includes a slide rail and a T-bolt, and the slide rail is provided with a T-shaped chute and a centrifugal fan The mounting bracket is connected to the T-shaped chute through T-shaped bolts. During the installation and disassembly of the centrifugal fan, only the nut set on the bolt needs to be loosened slightly, which reduces the working strength; 2. Because the mounting bracket uses T-shaped bolts Connected with T-shaped chute, T-shaped bolts can be easily inserted into T-shaped chute, thus reducing the requirements for installation accuracy and reducing the working intensity of installation; 3. T-shaped chute has an inclined sliding surface, T The type bolt has a matching clamping surface, so that when the T-shaped bolt is placed in the T-shaped chute, the sliding surface and the clamping surface interact to automatically align the motor and ensure the installation accuracy; 4. The mounting bracket There is a shock absorber between it and the fixing nut, which can reduce the vibration introduced to the centrifugal fan and ensure its working life; 5. The centrifugal impeller is provided with a tapered groove. When the motor and the centrifugal impeller are fixed, the front end of the motor is placed In the conical groove, the volume of the centrifugal fan group can be reduced to make it smaller; 6. The centrifugal impeller is provided with a slot, which can facilitate positioning during the blade welding process of the centrifugal impeller.

BRIEF DESCRIPTION

1 is a front view of the high-maintenance integrated centrifugal ventilation unit disclosed in the present invention;

Figure 2 is the right side view of Figure 1;

Figure 3 is an enlarged view of the dotted line in Figure 2;

Figure 4 is a structural diagram of the slide rail;

Figure 5 is a structural diagram of the T-bolt;

Figure 6 is a structural diagram of the centrifugal impeller;

7 is a right side view of FIG. 6;

Figure 8a is a front view of the current collector;

8b is a cross-sectional view at A-A in FIG. 8a;

Fig. 9 is a structural diagram of a motor output shaft.

In the picture: 1. current collector, 10, groove, 11, sealant strip, 2. centrifugal impeller, 20, front disc, 21, backward blade, 22, rear disc, 23, shaft disc, 24, slot , 25, tapered groove, 3, mounting bracket, 30, mounting plate, 4, motor, 40, water leak, 41, output shaft, 42, threaded portion, 43, tapered portion, 5, slide rail, 50, T-shaped chute, 51, screw receiving groove, 52, clamping groove, 53, sliding surface, 6, T-bolt, 60, head, 61, screw, 62, clamping surface, 7, fixing nut, 8, minus Vibrator.

detailed description

As shown in FIGS. 1 and 2, a high-maintenance integrated centrifugal ventilation unit disclosed by the present invention includes a current collector 1, a centrifugal impeller 2, a mounting frame 3, and a motor 4. The motor 4 is fixed on the mounting frame 3 The centrifugal impeller 2 is mounted on the output shaft 41 of the motor 4, the current collector 1 is fixed on the mounting frame 3 and placed at the front end of the centrifugal impeller 2, and also includes a slide rail 5 and a T-bolt 6, the slide rail 5 is provided with a T-shaped chute 50 extending in the longitudinal direction thereof, and the mounting bracket 3 is installed in the T-shaped chute 50 through a T-shaped bolt 6. The slide rail 5 is fixed to the bottom mounting beam of the vehicle by bolts.

Specifically, as shown in FIGS. 3, 4 and 5, the T-shaped chute 50 includes a screw receiving groove 51 and a clamping groove 52, and the clamping groove 52 has two sliding surfaces 53, the two sliding The surface 53 is oppositely arranged with the center line of the T-shaped chute 50 as the axis of symmetry. The T-shaped bolt 6 includes a head 60 and a screw 61. The head 60 is fixed to one end of the screw 61. The head 60 has a screw 61 An engaging surface 62 having the same angle as the sliding surface 53 is provided on one end surface of the shaft, and a fixing nut 7 for fixing the T-bolt 6 and the mounting frame 3 is provided on the screw 61. When the T-shaped bolt 6 is connected to the T-shaped chute 50, the head of the T-shaped bolt 6 is placed in the clamping groove 52 and the clamping surface 62 is in contact with the sliding surface 53, the T-shaped bolt 6 can be in the T-shaped chute 50 slide.

As shown in Fig. 1, the current collector 1, the centrifugal impeller 2 and the motor 4 are all installed on the mounting frame 3 to form an integrated structure, and the mounting frame 3 is fixed with a T-bolt 6, when the centrifugal ventilation unit needs to be installed on the locomotive When disassembling it for maintenance, you can loosen the fixing nut slightly to slide the centrifugal fan in or out from the slide rail, avoiding the need to completely remove the bolts during the disassembly and assembly process of the existing centrifugal fan. The screw-in and screw-out causes time-consuming and other problems. The centrifugal ventilation unit of the present invention can be installed on the locomotive through the slide rail, or can be hoisted on the locomotive.

The sliding surface 53 may be perpendicular to the center line of the T-shaped sliding groove 50 so that the clamping groove 52 is a rectangular groove. When the centrifugal ventilation unit is hoisted on the locomotive, preferably, as shown in FIG. 4, the sliding surface 53 and the center line of the T-shaped chute 50 are inclined so that the locking slot 52 is on both sides along the center line of the T-shaped chute 50 The depth gradually increases in the direction of (the cross-sectional shape of the clamping slot is a right-angled trapezoid with two upper bottoms butted, and the sides of the two right-angled clips of the trapezium are on the side away from the screw receiving groove in the height direction of the slide rail), the head The engaging surface 62 of the portion 60 is an inclined surface having the same angle as the oblique waist of the trapezoid. When the mounting bracket 3 is connected to the T-shaped chute 50 through the T-shaped bolt 6, the T-shaped bolt 6 interacts with the sliding surface and the clamping surface under the gravity of the centrifugal ventilation unit, making the center line of the T-shaped bolt and the T-shaped sliding The center lines of the slots are aligned with each other to ensure installation accuracy.

Further, as shown in FIG. 3, a damper 8 is further provided between the mounting frame 3 and the fixing nut 7, which can reduce the vibration between the locomotive and the centrifugal ventilation unit.

Further, as shown in FIG. 1, one end of the mounting bracket 3 on which the current collector 1 is fixed has a mounting plate 30, as shown in FIGS. 8a and 8b, the mounting surface of the current collector 1 is provided with a groove 10. In the groove 10, it is fixedly connected to the mounting plate by a countersunk bolt, and a sealing strip 11 is provided in the groove 10.

Further, as shown in FIGS. 6 and 7, the centrifugal impeller 2 includes a front disc 20, a backward blade 21, a rear disc 22, and a shaft disc 23. The front disc 20, the rear blade 21, and the rear disc 22 are welded together The shaft disk 23 and the rear disk 22 are connected by bolts. The rear disk 22 has a tapered groove 25 recessed on the side of the front disk 20. When the motor is connected to the centrifugal impeller, the front end of the motor is placed in a cone In the shape of the groove, when the motor is fixed with the centrifugal impeller, the front end of the motor is placed in the tapered groove, which can reduce the volume of the centrifugal fan group and make it smaller. Preferably, the cone angle of the tapered groove is 152° to 156°.

Further, as shown in FIG. 7, a plurality of slots 24 are evenly distributed on the outer circumference of the front disc 20. The slots 24 are rectangular. The backward blades are inserted into the slots and welded and fixed. It is convenient to position the backward blades for welding.

Further, as shown in FIG. 9, the output shaft 41 of the motor is a tapered shaft, which includes a threaded portion 42 and a tapered portion 43. The threaded portion 42 is provided with a left-handed thread. The thread direction is opposite to that of the impeller. Avoid loose impeller.

Further, the upper and lower sides of the front and rear ends of the motor are provided with water leakage ports 40, which can facilitate the discharge of condensed water generated inside the motor due to changes in the external high and low temperature when sitting or lifting.

The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited to this. Any person familiar with the technical field within the technical scope disclosed by the present invention, according to the technical solutions of the present invention Equivalent substitutions or changes to the inventive concept should be covered by the protection scope of the present invention.

Claims

A high-maintenance integrated centrifugal ventilation unit includes a current collector, a centrifugal impeller, a mounting frame and a motor, the motor is fixed on the mounting frame, the centrifugal impeller is mounted on the output shaft of the motor, and the current collector is fixed on The mounting frame is placed on the front end of the centrifugal impeller. It is characterized in that it also includes a slide rail and a T-bolt. The slide rail is provided with a T-shaped chute extending along its length. The mounting frame is installed by a T-bolt In the T-shaped chute.
The high-maintenance integrated centrifugal ventilation unit according to claim 1, wherein the T-shaped chute includes a screw receiving groove and a clamping groove, and the clamping groove has two sliding surfaces, and the two sliding The surface is set opposite to the center line of the T-shaped chute as the axis of symmetry, and the inclination of the sliding surface and the center line of the T-shaped chute makes the groove gradually increase in depth along the center line of the T-shaped chute to both sides.

The T-bolt includes a head and a screw, the head is fixed at one end of the screw, an end surface of the head with the screw is provided with a clamping surface having the same angle as the sliding surface, and the screw is provided There is a fixing nut for fixing the T-bolt to the mounting bracket.
The high-maintenance integrated centrifugal ventilation unit according to claim 2, wherein a vibration damper is further provided between the mounting frame and the fixing nut.
The high-maintenance integrated centrifugal ventilation unit according to claim 3, characterized in that: the end of the mounting bracket on which the current collector is fixed has a mounting plate, and the mounting surface of the current collector is provided with a groove and a concave There is a sealing strip in the tank.
The high-maintenance integrated centrifugal ventilation unit according to claim 4, characterized in that the centrifugal impeller includes a front disc, a backward blade, a rear disc and a shaft disc, and the front disc, the backward blade and the rear disc are welded together , The axle disc and the rear disc are connected by bolts;

The rear disk has a tapered groove recessed on one side of the front disk. When the motor is connected to the centrifugal impeller, the front end of the motor is placed in the tapered groove.
The high-maintenance integrated centrifugal ventilation unit according to claim 4, wherein the cone angle of the tapered groove is 152° to 156°.
The high-maintenance integrated centrifugal ventilation unit according to claim 5, characterized in that: the front disk is circumferentially distributed with a plurality of slots, the slots are rectangular, and the backward blades are inserted into the slots and welded and fixed.
The high-maintenance integrated centrifugal ventilation unit according to claim 6, characterized in that the output shaft of the motor is a tapered shaft, and the front end of the tapered shaft has a left-hand thread, and the thread rotation direction is opposite to that of the impeller.
The high-maintenance integrated centrifugal ventilating unit according to claim 7, characterized in that water leakage ports are provided on the upper and lower sides of the front and rear ends of the motor.