CN201648420U - Rotary mechanism of seat type cantilever open hole machine - Google Patents

Abstract

The utility model discloses a rotary mechanism of a seat type cantilever open hole machine, which comprises vertical shafts and bushes, wherein the vertical shafts are arranged on rotating joints of various components, the bushes are rotatably matched with the two ends of the vertical shafts, the bushes are rare earth nylon bushes, matched gaps of the rare earth nylon bushes and the vertical shafts are that 1<L1/L2<5 (delta' is the matched gaps of the verticals shafts and the rare earth nylon bushes, L1 is a vertical distance from a gravity action line of a cantilever mechanism to a moment center, and is also known as a gravity arm, L2 is the vertical distance between the action lines of radial pressure of two rare earth nylon bushes, and is also known as a pressure arm, do is the diameter of the vertical shafts, and e is a work gap coefficient when the shafts and the rare earth nylon bushes are matched). The rotary mechanism of the seat type cantilever open hole machine uses the rare earth nylon bushes to replace graphite self-lubricating copper bushes, thereby increasing the abrasive resistance and service life, reducing the cost, and guaranteeing the working stability.

Description

The rotating mechanism of base type cantilever iron perforater

(1) technical field:

The utility model relates to the internal structure of iron-smelting blast furnace stokehold iron perforater, specifically a kind of rotating mechanism of base type cantilever iron perforater.

(2) background technology:

Iron perforater is the visual plant of iron-smelting blast furnace stokehold.

The iron perforater of base type cantilever structure generally is made up of five great institutions such as rotating, swing, send to, impact, change pricker.During work, rotating mechanism at first drives iron perforater integral body (whirling arm mechanism) and arrives aperture position from position of rest for 100 °～160 ° around the rotation of base column, then tilting mechanism driving beam-and-rail presses down, beam-and-rail front end grasp tangles the grasp seat on the furnace shell, sends, impacts, changes three great institutions such as pricker then to and work simultaneously.After finishing the opening action, walking dolly at first rollback to drill bit moves back iron notch fully, tilting mechanism drives on the beam-and-rail and lifts then, makes grasp break away from the grasp seat, and rotating mechanism drives iron perforater integral body again and gets back to position of rest from aperture position for 100 °～160 ° around the rotation of base column.

The advantage of base type cantilever iron perforater is that tapping outlet integral body can be that the basic point rotation arrives position of rest for 100 °～160 ° with the base column after an opening action was finished, and abdicates the work area of stokehold sheet, helps the comprehensive utilization of operating space.Its shortcoming is that three cradle head places of each member of rotating mechanism are supported by vertical shaft, the configuration of the two ends up and down lining of vertical shaft, under the action of gravity of member, each cradle head position is because of being subjected to the effect of gravitational torque, irregular wear all takes place in vertical shaft and lining, in case wearing and tearing acquire a certain degree, and then cause iron perforater integral body to shake, and influence normal operation.

The vertical shaft of described rotating mechanism generally adopts the mode of inlaying the graphite self-lubricating copper sheathing, though relatively be fit to the environment of stokehold high temperature, many dust pollutions, wear resistance is relatively poor relatively, and work-ing life is not high and cost an arm and a leg.

Once also attempt the rare earth nylon bush better with economy, that wear resistance is higher and replaced the graphite self-lubricating copper sheathing, and calculate the radially working clearance that vertical shaft cooperates with the rare earth nylon bush by traditional experimental formula (lining two ends do not stress square effect), this experimental formula is δ=d _o(δ is the radially working clearance that axle cooperates with lining to * e, d _oBe the diameter of axle, e is the working clearance coefficient of axle when cooperating with lining), but show in the practice, serious seize phenomenon can take place by the produced rare earth nylon bush of this gap, thereby cause the iron perforater unitary rotation ineffective, thereby the insider generally believes, the rare earth nylon bush is not suitable for using in the rotating mechanism of base type cantilever structure iron perforater.

(3) utility model content:

The purpose of this utility model has provided a kind of rotating mechanism of base type cantilever iron perforater of good operating stability.

Can realize the rotating mechanism of the base type cantilever iron perforater of above-mentioned purpose, comprise the vertical shaft (Z-axis) at each member cradle head place and the lining that the vertical shaft two ends are rotatably assorted, different is that the lining that is adopted is the rare earth nylon bush, determine the tolerance clearance of rare earth nylon bush and vertical shaft according to new test formula, this experimental formula is:

${\mathrm{\&delta;}}^{\&prime;}=\frac{L_1}{L_2}$ (d _o×e)

In the formula

The tolerance clearance of δ '-vertical shaft and rare earth nylon bush;

L ₁-member line of gravity is to the vertical range between the center of moment, the arm of force of weighing again;

L ₂Vertical range between the suffered radial compression applied line of-two rare earth nylon bushs claims pressure arm again;

d _o-vertical shaft diameter;

Working clearance coefficient when the e-axle cooperates with the rare earth nylon bush.

The rare earth nylon bush and the tolerance clearance of vertical shaft by above-mentioned formula is determined can effectively prevent serious seize phenomenon, thus the normal rotation of assurance whirling arm mechanism.

Through verification experimental verification, the occasion less than 5 all can be suitable for the aforementioned calculation formula greater than 1 at the ratio of weight arm and pressure arm, when the ratio of weight arm and pressure arm greater than 5 the time, then can be excessive and influence the stationarity of spinning movement because of axle and lining tolerance clearance.

The optimum ratio scope of weight arm and pressure arm for greater than 1 less than 2.5.

Advantage of the present utility model:

The rotating mechanism of the utility model base type cantilever iron perforater has been broken the understanding mistaken ideas of casthouse equipment industry to the rare earth nylon bush, on the experimental formula basis of traditional tolerance clearance of rare earth nylon bush and axle, released a brand-new formula, by redefining the tolerance clearance of vertical shaft and rare earth nylon bush, make the rare earth nylon bush become possibility being subjected under the situation of moment loading to use, solved and adopted the difficult problem that the wear resistance of inlaying the graphite self-lubricating copper sheathing and occurring is too poor, work-ing life is not high and price is too expensive in the primary structure.

(4) description of drawings:

Fig. 1 is the stressing conditions figure that the rotating mechanism of square effect rotates around transverse axis by left and right two rare earth nylon bushs that do not stress.

Fig. 2 is the stressing conditions figure of a kind of embodiment of the utility model, is specially in the rotating mechanism stressing conditions figure of each cradle head place's vertical shaft and upper and lower two rare earth nylon bushs.

Figure number sign: 1, vertical shaft; 2, transverse axis; 3, rare earth nylon bush.

(5) embodiment:

As shown in Figure 1, transverse axis 2 two ends are nested rare earth nylon bush 3 respectively, rare earth nylon bush 3 is located in the cradle head place of rotating mechanism, transverse axis 2 is subjected to the gravity G effect of rotating mechanism, on rare earth nylon bush 3, produce supporting power N1 and N2 respectively owing to gravity G, owing to there is not moment that transverse axis 2 is had an effect, so G=N1+N2, transverse axis 2 is δ=d with the calculation formula of rare earth nylon bush 3 tolerance clearances _o(δ is the radially working clearance mm that transverse axis cooperates with the rare earth nylon bush to * e; d _oBe transverse axis diameter mm; E is the working clearance coefficient of axle when cooperating with the rare earth nylon bush).

With the transverse axis 2 of 100mm diameter to be joined rare earth nylon bush 3 be example: learn through looking into related data, the working clearance coefficient that cooperates with the rare earth nylon bush that base diameter is of a size of 100mm is 0.005～0.006, radially working clearance δ=100mm * (0.005～0.006)=0.5mm～0.6mm that the transverse axis 2 of calculating this moment cooperates with rare earth nylon bush 3.

As shown in Figure 2, each vertical shaft 1 two ends of the rotating mechanism of base type cantilever iron perforater are nested rare earth nylon bush 3 respectively, vertical shaft 1 is subjected to member gravity G effect, produces radial support power N1 and N2 respectively on two rare earth nylon bushs 3, both moment equilibrium (G * L owing to the moment of gravity G generation ₁=N1 * r1+N2 * r2=N * L2), rare earth nylon bush 3 with the calculation formula of vertical shaft 1 tolerance clearance is:

${\mathrm{\&delta;}}^{\&prime;}=\frac{L_1}{L_2}$ (d _o×e)

(δ ' be the tolerance clearance of vertical shaft 1 and rare earth nylon bush 3; L ₁Be the vertical range between gravity G line of action and the center of moment, L ₂Be the vertical range between two radial pressure N1, the N2 line of action, d _oDiameter for vertical shaft 1; E is the working clearance coefficient of axle when cooperating with rare earth nylon bush 3.

Equally with the vertical shaft 1 of 100mm diameter to be joined rare earth nylon bush 3 be example: it is 0.005～0.006 that base diameter is of a size of the working clearance coefficient that the axle of 100mm cooperates with the rare earth nylon bush, as if L ₁/ L ₂=2, the vertical shaft 1 of calculating this moment and tolerance clearance δ '=2 * (0.005～0.006)=1.0mm～1.2mm of rare earth nylon bush 3.

Calculation formula of the present utility model is adapted at weight arm L ₁With pressure arm L ₂Ratio greater than 1 less than using the weight arm L of best occasion under 5 the situation ₁With pressure arm L ₂Ratio be less than 2.5 greater than 1.

Claims (2)

1. the rotating mechanism of base type cantilever iron perforater, comprise the vertical shaft (1) at each member cradle head place and the lining that is rotatably assorted with vertical shaft (1) two ends, it is characterized in that described lining is rare earth nylon bush (3), and the tolerance clearance of rare earth nylon bush (3) and vertical shaft (1) is:

${\mathrm{\&delta;}}^{\&prime;}=\frac{L_1}{L_2}(d_o\&times;e)$

1＜L ₁/L ₂＜5；

δ ' is the tolerance clearance of vertical shaft (1) and rare earth nylon bush (3) in the formula, L ₁For the member line of gravity is a weight arm to the vertical range between the center of moment, L ₂Be that vertical range between the suffered radial compression applied line of two rare earth nylon bushs (3) is a pressure arm, d _oBe the vertical shaft diameter, e is axle and the working clearance coefficient of rare earth nylon bush (3) when cooperating.

2. the rotating mechanism of base type cantilever iron perforater according to claim 1 is characterized in that: 1＜L ₁/ L ₂＜2.5.

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