CN103453092A - Chain tensioning device and method for slag raking machine - Google Patents

Abstract

The invention provides a chain tensioning device and method for a slag removing machine. When the extension or retraction action of the telescopic arm of the slag raking machine is finished, the tensioning chain wheel moves downwards under the action of the spring to be in a free tensioning state; when the telescopic arm retracts or extends, the tensioning chain wheel and the meshed chain restrain the chain from vibrating up and down; when the chain stretches, the nut can be adjusted to change the pre-pressure of the spring; when the chain generates transverse force, a clearance is reserved to enable the tensioning chain wheel to move transversely, so that transverse floating support guiding is realized; when the tension of the chain is changed, the chain moves vertically along with the tension sprocket to slow down and eliminate part of instant tension. The invention can effectively relieve the impact load caused by frequent reversing, improve the stress state of chain transmission, and improve the service life and the operation reliability of the chain.

Description

Chain tensioning device and method for slag removal machine

technical field

The invention belongs to the field of transmission devices, and in particular relates to a tensioning device and a tensioning method for a chain of a slag picker.

Background technique

The traditional slag removal machine uses a slag removal board to remove slag, and the slag removal board is fixed on the telescopic arm of the slag removal machine, and moves with the telescopic arm in front and back, left and right, up and down, etc., to remove sulfur-containing slag into the slag tank below. The telescopic action of the telescopic arm is driven by a hydraulic motor and driven by a chain and a sprocket. Due to frequent telescopic movements, the impact of hydraulic motor commutation on the chain is very large, the life of the chain is low, and abnormal damage seriously affects the smooth progress of production. 

Chain transmission is a meshing transmission with intermediate flexible parts, which has some characteristics of gear transmission and belt transmission. Chain damage generally includes fatigue damage, wear, gluing, etc., among which gluing damage is related to lubrication and high speed; wear is related to the position between the driving sprocket, driven sprocket and guide wheel; fatigue damage in closed chain transmission is related to The number of cycles is related to the impact load; in the case of equal lubrication, fatigue damage is the main factor determining the transmission capacity of the chain. The wear of the chain drive is generally guaranteed by adjusting the position between the driving sprocket, the driven sprocket, the guide wheel and the reasonable space arrangement. When the position between the driving sprocket, the driven sprocket, and the guide wheel changes, it may cause the chain plate to bear the thrust of the guide sprocket, which will cause the chain to deteriorate and be easily damaged.

The fatigue damage of the chain drive generally uses a tensioner to reduce the impact. But so far, there is no tensioning device that is fully suitable for the frequent reversing chain drive of the slag scraper.

Contents of the invention

The present invention aims to provide a slag removal machine chain tensioning device that can realize automatic adjustment in three-dimensional directions, effectively alleviate the impact load caused by frequent reversing, improve the stress state of the chain transmission, and improve the service life and operational reliability of the chain. method.

For this reason, the solution that the present invention takes is:

A chain tensioning device for a slag removal machine, characterized in that it consists of a fixed seat, a support screw, a spring, an adjustment nut, a slideway support, a chain, a tensioning sprocket, a sprocket shaft, a slider, a bearing, and a support connecting plate and a screw connecting plate; each of the upper ends of the "U"-shaped fixed seat is welded with a horizontal plate protruding outward, and a slideway support is fixed on the inner side of the horizontal plate, and the upper ends of the two slideway supports pass through the support connecting plate Fixed together, a support screw is connected to the outer side of the horizontal plate, and the support screw penetrates into the screw hole of the slider; the middle part is provided with a limit stop, and the inner side of the slider with an end hole is slidably connected to the slideway support. One end of the sprocket shaft installed in the end hole of the slider is locked with a set screw, and a gap is reserved between the other end and the bottom of the end hole; the tension sprocket meshed with the chain is mounted on the sprocket shaft through a bearing; the supporting screw The upper part is equipped with a spring, the lower end of the spring is connected with the slide block, the upper end of the spring is provided with an adjusting nut, and the screw connecting plate is fixed on the adjusting nut; the fixing seat is connected on the supporting cross arm of the slag scraper.

There are gaps between the limit stopper of the slider and the support of the slideway, as well as between the support screw and the hole of the screw of the slider.

A chain tensioning method for a slag picker, characterized in that the specific method is:

Weld the fixed seat of the chain tensioning device on the support cross arm between the driving sprocket and the guide sprocket of the slag remover, and engage and press the tensioning sprocket against the chain;

When the stretching or retracting action of the telescopic arm of the slag scraper ends, the hydraulic motor stops, the chain turns from the working state to the stopped state, and the tensioning sprocket of the chain tensioning device moves downward under the preload of the spring, so that the chain is Free tension state; when the telescopic arm of the slag scraper begins to retract or extend, the hydraulic motor starts in reverse, and the tensioning sprocket is pulled upward by the chain greater than the downward preload of the spring, so that the tensioning sprocket and its mesh The chain is slowly lifted while rotating, restraining the up and down vibration of the chain, and realizing effective buffering and automatic tensioning in the process of frequent reversing;

When the chain stretches after a period of use, change the preload of the spring by adjusting the nut to adjust the initial tension applied to the chain;

When the lateral force caused by the position deviation of the chain occurs, the reserved gap between the sprocket shaft and the bottom of the end hole, between the slider limit stopper and the slideway support, and between the support screw and the slider screw hole will make The tensioning sprocket can move in a small range laterally to realize lateral floating support and guidance;

When the chain is subjected to a sudden change of pulling force in the forward or backward direction, the chain will move up and down vertically with the tensioning sprocket to slow down and eliminate part of the instantaneous tension and improve the stress state of the chain.

The beneficial effects of the present invention are:

The invention can realize the automatic adjustment of the chain up and down, front and back, left and right, that is, three-dimensional directions, so that the chain can be kept in a tensioned state along the transmission direction of the sprocket, and at the same time, it can ensure that the chain plate bears the lateral thrust brought by the guide wheel; the tensioning device has left and right The moving function can keep the tensioning wheel always on the "two points and one line" between the driving sprocket and the driven sprocket; the tensioning device has the function of moving up and down, so that the tension force has the function of automatic compensation. Therefore, the present invention can effectively alleviate the impact load caused by frequent reversing, improve the stress state of the chain transmission, and improve the service life and operation reliability of the chain.

Description of drawings

Figure 1 is a sectional view of the chain tensioning device of the slag removal machine;

Figure 2 is a schematic diagram of the installation position of the chain tensioning device of the slag removal machine.

In the figure: support cross arm 1, fixed seat 2, support screw 3, chain 4, positioning screw 5, spring 6, adjustment nut 7, slideway support 8, bearing 9, tensioning sprocket 10, sprocket shaft 11, screw Connecting plate 12, bearing connecting plate 13, spacer 14, slide block 15, limit block 16, guide sprocket 17, tensioning device 18, driving sprocket 19. the

Detailed ways

It can be seen from Fig. 1 that the chain tensioning device of the slag removal machine of the present invention is mainly composed of a supporting cross arm 1, a fixing seat 2, a supporting screw rod 3, a chain 4, a spring 6, an adjusting nut 7, a slideway support 8, a bearing 9, a tensioning Tight sprocket 10, sprocket shaft 11, screw connecting plate 12, bearing connecting plate 13, slide block 15 and relevant connectors are formed.

Slide block 15 is two, is processed with circular end hole in the inner end of slide block 15, is provided with a limit stop 16 in the middle, and the outside has the screw rod hole that supports screw rod 3 is installed. The fixed seat 2 is in the shape of a "U" as a whole, and a horizontal plate protruding outward is welded on the upper end of the "U" shape. A slideway support 8 is respectively fixed on the inner side of the horizontal plate, and the two slideway support 8 The upper ends are fixed together by the support connecting plate 13. A supporting screw rod 3 is respectively fixed by bolts on the outer side of the horizontal plate of the fixing base 2 , and the supporting screw rod 3 penetrates in the screw rod hole of the slide block 15 . The inner side of the slide block 15 is slidably connected to the slideway support 8, so that the slide block 15 can slide up and down along the slideway support 8, and the position of the slideway support 8 is controlled by the limit stopper 16 in the middle of the slide block 15. The two ends of the sprocket shaft 11 are installed in the end holes of the slider 15, wherein the sprocket shaft 11 on the right side is locked in the end hole with the set screw 5, and the shaft head of the sprocket shaft 11 on the left side is connected to the bottom of the end hole. There is a gap between them. Bearing 9 is housed on the sprocket shaft 11, and bearing 9 outside mounts tensioning sprocket 10, and tensioning sprocket 10 is meshed with chain 4. A spring 6 is installed on the top of the supporting screw rod 3, the lower end of the spring 6 leans against the slider 15, and the upper end of the spring 6 is provided with an adjustment nut 7, between the spring 6 and the slider 15 and between the spring 6 and the adjustment nut 7 Fitted with spacer 14. The top of the adjustment nut 7 is fixed with a screw connecting plate 12 with a nut, and the screw connecting plate 12 connects the upper ends of the two supporting screw rods 3 together. The fixed base 2 is connected to the support cross arm 1 of the slag removal machine.

In order to realize the chain 4 horizontal or left-right guiding function, there is a reserved gap between the limit stop 16 of the slider 15 and the slideway support 8, and the diameter of the screw hole of the slider 15 is slightly larger than the diameter of the supporting screw 3 , Make also leave gap between the screw rod hole of support screw rod 3 and slide block 15.

The specific control method of the slag removal machine chain tensioning method of the present invention is:

First, as shown in Figure 2, the fixing seat 2 of the chain tensioning device 18 is welded on the support cross arm 1 of the slag removal machine, its position is located between the driving sprocket 19 and the guide sprocket 17, and the tensioning chain Wheel 10 engages and presses against the top of chain 4, and chain 4 is taut.

When the stretching or retracting action of the telescopic arm of the slag scraper ends, the hydraulic motor stops, and the chain 4 will turn from the working state to the stop state, and the tensioning sprocket 10 will move downward under the preload of the spring 6, so that the chain 4 is free. Tensioned state. When the telescopic arm of the slag scraper begins to retract or extend, the hydraulic motor starts in reverse, and the tensioning sprocket 10 is pulled upward by the chain 4 greater than the downward preload of the spring 6, so that the tensioning sprocket 10 and its meshing The chain 4 is slowly lifted while rotating, thereby avoiding the chain 4 from vibrating violently up and down, and realizing effective buffering and automatic tensioning of the chain 4 in the process of frequent reversing.

When the chain 4 becomes stretched after being used for a period of time, the preload of the spring 6 can be changed by adjusting the nut 7 to adjust the initial tension applied to the chain 4 to ensure that the chain 4 is always in a tensioned state.

When the lateral force caused by the position deviation occurs in the chain 4, due to the gap between the shaft head of the left sprocket shaft 11 and the bottom of the end hole, between the limit stopper 16 of the slider 15 and the slideway support 8, and between the support screw 3 and the bottom of the end hole. There is a reserved gap between the screw holes of the slider 15, so that the tensioning sprocket 10 can move in a small range in the horizontal direction, that is, the left and right directions, and realize the horizontal floating support and guiding function.

When the chain 4 is subjected to a sudden change of pulling force in the forward or backward direction, the chain 4 will move vertically up and down along with the tensioning sprocket 10, slowing down and eliminating part of the instantaneous tension, improving the stress state of the chain 4, thereby To the protection of chain 4.

Claims (3)

1. A chain tensioning device for a slag removal machine, characterized in that it consists of a fixed seat, a support screw, a spring, an adjustment nut, a slideway support, a chain, a tensioning sprocket, a sprocket shaft, a slider, a bearing, and a support Composed of a connecting plate and a screw connecting plate; a horizontal plate protruding outward is welded on the upper end of the "U"-shaped fixing seat, and a slideway support is respectively fixed on the inner side of the horizontal plate, and the upper ends of the two slideway support pass through the support The connecting plates are fixed together, and the outer sides of the horizontal plates are respectively connected with a supporting screw, and the supporting screw penetrates into the screw hole of the slider; the middle part is provided with a limit stop, and the inner side of the slider with an end hole is slidably connected to the slideway support One end of the sprocket shaft installed in the end hole of the slider is locked with a set screw, and a gap is reserved between the other end and the bottom of the end hole; the tensioning sprocket meshing with the chain is mounted on the sprocket shaft through a bearing; The upper part of the supporting screw is equipped with a spring, the lower end of the spring is connected with the slide block, the upper end of the spring is provided with an adjusting nut, and the screw connecting plate is fixed on the adjusting nut; the fixing seat is connected on the supporting cross arm of the slag scraper. 2. The chain tensioning device of the slag removal machine according to claim 1, characterized in that there are gaps between the limit stopper of the slider and the support of the slideway, and between the supporting screw and the screw hole of the slider. 3. A method for applying the slag removal machine chain tensioning device according to claim 1, characterized in that, the specific method is: Weld the fixing seat of the chain tensioning device to the support cross arm between the driving sprocket and the guide sprocket of the slag remover, and engage and press the tensioning sprocket against the chain; When the stretching or retracting action of the telescopic arm of the slag scraper ends, the hydraulic motor stops, the chain turns from the working state to the stopped state, and the tensioning sprocket of the chain tensioning device moves downward under the preload of the spring, so that the chain is Free tension state; when the telescopic arm of the slag scraper begins to retract or extend, the hydraulic motor starts in reverse, and the tensioning sprocket is pulled upward by the chain greater than the downward preload of the spring, so that the tensioning sprocket and its mesh The chain is slowly lifted while rotating, restraining the up and down vibration of the chain, and realizing effective buffering and automatic tensioning in the process of frequent reversing; When the chain stretches after a period of use, change the preload of the spring by adjusting the nut to adjust the initial tension applied to the chain; When the lateral force caused by the position deviation of the chain occurs, the reserved gap between the sprocket shaft and the bottom of the end hole, between the slider limit stopper and the slideway support, and between the support screw and the slider screw hole will make The tensioning sprocket can move in a small range laterally to realize lateral floating support and guidance; When the chain is subjected to a sudden change of pulling force in the forward or backward direction, the chain will move up and down vertically with the tensioning sprocket to slow down and eliminate part of the instantaneous tension and improve the stress state of the chain.