CN1084108A - A kind of electrical liquid hammer system driven by feed liquid - Google Patents

Abstract

The electro-hydraulic hammer system that the present invention beats for a kind of feed liquor is particularly suitable for the steaming hollow hammer of thick hammer stem structure---the both arms hammer of overhanging hammer, thick hammer stem and do not have the usefulness that the anvil block die hammer transform electric liquid hammer as.Process one in the hammer stem upper end and drive fluid cylinder, the middle feed tube that inserts, sealed with lining and sealing ring therebetween, the upper end of feed tube is fixed on the insurance cylinder cap, be connected with control valve with pipeline, the downward accelerated motion of tup realizes hitting when advancing high pressure liquid, and the compressed air that utilizes the piston cavity of resorption to store during tapping makes the tup backhaul.The present invention has can maximally utilise original parts, reduces improvement expenses and energy resource consumption, the reliable in action of hammer, and the advantage of unlikely generation spring strike.

Description

A kind of electrical liquid hammer system driven by feed liquid

The present invention relates to the metal-working plant field, particularly have the both arms hammer of the steaming hollow hammer-overhanging hammer of thick hammer stem structure, thick hammer stem and do not have the design that the anvil block die hammer transform electric liquid hammer as.

The energy utilization rate of active service steaming hollow hammer is extremely low, can save energy 80～95%, remarkable benefit after transforming electric liquid hammer as.But present existing electro-hydraulic hammer system as Chinese patent application CN86201875, CN87206699 and CN87101725, all can not be applied to the overhanging hammer of thick hammer stem structure or not have the anvil block die hammer transform electric liquid hammer as.This is because of overhanging hammer or does not have the instructions for use of anvil block die hammer and the change that stress has determined not allow original cylinder hammer stem structure is done essence, and fundamentally do not change overhanging hammer or do not have the structural system of anvil block die hammer, above-mentioned patent system just can not be used prior art with overhanging hammer or do not have the anvil block die hammer and transform electric liquid hammer as.Up to now also not about answering electricity consumption liquid hammer technological transformation overhanging hammer or not having the report of anvil block die hammer.

The objective of the invention is to: do not change agent structures such as the cylinder of this class hammer and tup, also can or not have the anvil block die hammer and transform electric liquid hammer as to obtain a large amount of energy-conservation effects with overhanging hammer.

The present invention is applied to transform the structural representation of single armed steam hammer and sees accompanying drawing 1, and correct realizes on the basis of its major part such as support 1, hammer stem 2, pilot seal assembly 3, cylinder 4, piston 5, damper cylinder 9, damper cylinder piston 8 and damping cylinder cap 11 in original structure.Processing a blind hole in the upper end of hammer stem 2, insert feed tube 7 by seal cartridge 6, form below feed tube 7 and drive sap cavity a, is backhaul air chamber b below piston 5, and backhaul air chamber b is connected with gas tank 19.Drive sap cavity a and play fluid cylinder; The upper end of feed tube 7 is fixed on the center of damping cylinder cap 11 with flange 12; Seal cartridge 6 is fixed on the piston 5, and the high pressure liquid that drives in the sap cavity a is sealed.The upper end of feed tube 7 is connected by the liquid outlet of pipeline with control valve 14, and the inlet of control valve 14 is connected to the high pressure liquid source 15 of band accumulator 13, and another liquid mouth then leads to liquid case 16.Cavity of resorption b at cylinder 4 inner carriers 5 connects the gas tank 19 with certain pressure and volume by air flue, 19 of gas tanks connect extraneous tonifying Qi source 17 and have TT﹠C system to keep jar internal gas pressure within setting range, it sets air pressure range can be according to deciding hammer stem 2 backhauls, to supply with the needed power of tup backhaul to required time and the acceleration in top.Compressed air or ordinary nitrogen through filtering that the tonifying Qi source is preferably supplied with by compressed air pipe network or small-sized air compressor also can be used other sources of the gas.The epicoele c of cylinder 4 inner carriers 5 communicates with atmosphere via original air flue and air filter 18 or check valve 23, and it is enough big and have a gas tank of the check valve of exitting also can directly to lead to a volume by air flue.

The present invention's " a kind of electrical liquid hammer system driven by feed liquid " is work like this: when control valve 14 was in meta, the high pressure liquid of coming from Hydraulic Station (accompanying drawing 1 does not draw) entered accumulator 13 with storage hydraulic pressure energy by pipeline 15.When control valve 14 changes to hit position, high pressure liquid enters through feed tube 7 by enough big passage and drives sap cavity a, the external diameter area of feed tube 7 multiply by the long-pending driving force that is of liquid pressure, and this power acts on hammer stem 2 downwards, makes the tup system obtain acceleration and moves the realization strike downwards; Reaction force upwards then acts on feed tube 7 and acts on the damping cylinder cap 11 by flange 12 and connector.The stroke of tup is big more, and then blow energy is big more.When tup is got to forging nearly, control valve should in time commutate, driving sap cavity a is communicated with the liquid case, then, piston 5 cavity of resorption b compressed airs make hammer stem up owing to upwarding pressure, ordinary circumstance, when hammer stem 2 went upward to piston 5 and also has certain distance apart from the lower end lug boss 30 of damper cylinder piston 8, control valve 14 just should be got back to meta, in order to avoid piston hits the top.When needs strengthen blow energy, can make piston 5 bump against damper cylinder piston lug boss 30 wittingly, carry out the control valve commutation then at once, make hammer stem 2 descending to obtain bigger blow energy.Control valve 14 can be a servo valve, also can be inserted valve.The used high pressure liquid source of native system can be a band accumulator 13, also can be that liquid pump is direct drive.In addition, in misoperation or adjust (too high) not at that time as b chamber level pressure, all the situation that hammer stem 2 hits the top may take place, in order to prevent hammer stem 2 and seal cartridge 6 backhauls to pushing up the phenomenon of hitting the top, avoid rigid impact damage parts, must the damping safeties be set at peen, damping can adopt different structures and principle to realize with safety effect, damping spring shown in the accompanying drawing 1～4 or groups of springs, damper cylinder and cushion plugs can both play the damping safety effect.

As shown in Figure 1, under the prerequisite of not using steam, damping and safety effect can be realized with the damping spring 10 with suitable rigidity, the bottom of spring 10 pack into the transformation of the way after damper cylinder piston 8 in, at this moment 8 in former damper cylinder piston plays suspension, the center drilling so that feed tube 7 pass through.The upper end of spring 10 then props up damping cylinder cap 11, and the damping cylinder cap 11 after the transformation of the way not only has centre bore to allow that feed tube 7 passes through, and makes one group of screw bolting feed tube flange 12.

The effect of damping spring 10, also can replace at one group of spring 20 of outside encapsulation of original cylinder bolt and double-screw bolt 21, see accompanying drawing 2, at this moment original damper cylinder 9 and damper cylinder piston 8 are all abandoned and need not, and the suspension 22 of a bottom of new system band lug boss 30, the lower end of groups of springs 20 is pressed on the suspension 22, and the upper end still props up damping cylinder cap 11.When near hitting when top, lug boss 30 pressurizeds, suspension 22 rises, groups of springs 20 pressurizeds and played cushioning effect.

Damping and safety effect also can be as shown in Figure 3, utilize damper cylinder 9 and damper cylinder piston 8, the center is made the hole of passing through for feed tube 7 and is realized, epicoele at piston 8 fills to have the compressed air of suitable pressure (being generally 0.7MPa), in the case, between the internal diameter of the external diameter of damper cylinder piston 8 and damper cylinder 9 sealing ring 28 to be arranged, between its mesopore and the feed tube 7 sealing ring 29 be arranged, and also sealing ring 31 will be arranged between damping cylinder cap 11 and the feed tube 7.

Damping and safety effect, a buffering orifice plug also can be set in the bottom of the driving sap cavity a below the feed tube 7 to be realized, as shown in Figure 4, cushion plugs is by cock body 24, steel ball 25, spring 26 and plug screw 27 are formed, cock body 24 can be packed into the method for shrinkage and be fixed by interference fit in the shrinkage pool that drives sap cavity a bottom, its top is made the round platform that contains one section conical surface and is matched with the endoporus of feed tube 7, forms the throttle clearance of a gradual change, when backhaul is close to the top, cock body is blocked the mouth of pipe of feed tube 7, only stay throttle clearance to lead to liquid, this raises the hydraulic pressure that drives in the sap cavity a and hammer stem 2 is slowed down, thereby plays cushioning effect.Each part of cushion plugs is formed a check valve, can guarantee can feed high pressure liquid when hitting and start rapidly next time, and unlikely generation starts hysteresis.

Compare with the electro-hydraulic hammer system that application number CN87206699, CN87101725 tapping are beaten, in the main driving cylinder that tapping is beaten, driving gas acts on the top of piston, and backhaul drives liquid effects in lower part of piston, feed liquor of the present utility model is beaten system, and backhaul leans on positice ground effect in the piston bottom.Therefore, beat system, after finishing the strike action, can not in time enter, will take place repeatedly to hit, workpiece may be broken because of spring if backhaul drives liquid in tapping; And beat system at feed liquor, and hydraulic system always has positice ground effect below piston when work, both made hammer stem have spring that following situation of beating can not take place once more yet after once hitting, and this is very favourable to Forging Technology.

In addition, the present invention is specially adapted to the steaming hollow hammer of thick hammer stem, as overhanging hammer, and counterblow hammer, the both arms hammer of thick hammer stem etc. transform electric liquid hammer as.Have and can maximally utilise original parts, greatly reduce and change the hammer workload, reduce improvement expenses, save the energy in a large number, reliable in action can not take place after the strike because of spring the advantage of hitting once more to take place.

Claims (8)

1, the electro-hydraulic hammer system that a kind of feed liquor is beaten, it has support 1, hammer stem 2, pilot seal assembly 3, cylinder 4, piston 5, damping cylinder cap 11 and liquid case 16 is characterized in that: process a blind hole in the upper end of hammer stem 2, insert feed tube 7 by seal cartridge 6, form below feed tube 7 and drive sap cavity a, feed tube 7 is fixed on damper cylinder and covers, and the upper end of feed tube 7 is connected by the liquid outlet of pipeline with control valve 14, the inlet of control valve 14 is connected to high pressure liquid source 15, be backhaul air chamber b below piston 5, described backhaul air chamber is connected with gas tank 19, is provided with damper cylinder 9 at the top of hammer.

2, electrical liquid hammer system driven by feed liquid as claimed in claim 1 is characterized in that: the hammer stem that prevents of damper cylinder 9 hits the safety effect on top, adopts and to pack spring 10 or be inserted in groups of springs 20 realize outside bolt 21 above the damper cylinder piston 8 into.

3, electrical liquid hammer system driven by feed liquid as claimed in claim 1 is characterized in that: the hammer stem that prevents of damper cylinder 9 hits the safety effect on top, adopts toward the interior Compressed Gas that feeds of damper cylinder and realizes.

4, electrical liquid hammer system driven by feed liquid as claimed in claim 1 is characterized in that: prevent that hammer stem from hitting the damping safety effect on top, adopt the cushion plugs 24 of packing in the driving sap cavity a below feed tube 7 to realize.

5, electrical liquid hammer system driven by feed liquid as claimed in claim 1 is characterized in that: the cavity of resorption b of piston 5 feeds Compressed Gas and realizes the hammer stem backhaul.

6, electrical liquid hammer system driven by feed liquid as claimed in claim 1 is characterized in that: the epicoele c of piston 5 can communicate by air filter 18 or check valve 23 and atmosphere, also can be connected with the lower pressure tanks that has enough big volume and have a check valve.

7, electrical liquid hammer system driven by feed liquid as claimed in claim 1 is characterized in that: control valve 14 can be a servo valve, also can be inserted valve.

8, electrical liquid hammer system driven by feed liquid as claimed in claim 1 is characterized in that: the high pressure liquid source can be the band accumulator, also can be that liquid pump is direct drive.

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