CN1361374A

CN1361374A - Hydraulically driven high-pressure dry oil-lubricated pump

Info

Publication number: CN1361374A
Application number: CN 00136792
Authority: CN
Inventors: 郭宝权
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-12-29
Filing date: 2000-12-29
Publication date: 2002-07-31
Anticipated expiration: 2020-12-29
Also published as: CN1271364C

Abstract

The dry oil lubricated pump driven by high hydraulic pressure includes a hydraulic mechanism comprising bi-directional piston and oil cylinder, many dry oil hydraulic mechanisms comprising oil plunger and plunger sleeve, and a dry oil pressure storage with piston. Between the oil inlet pipe and oil outlet pipe of the hydraulic mechanism, there are two parallel and opposite pressure limiting monoway eduction valves. The plunger linked to piston and the plunger sleeve fixed to the top of the hydraulic cylinder are fitted tightly and slidely, and the plunger has dry oil inlet amount controlling valve, pressure limiting eduction valve and high pressure monoway oil oultet valve. Dry oil is supplied by one pressurized oil tank with filter and bubble eliminator. The present invention is safe and can control the oil applying amount in various points.

Description

Hydraulically driven high-pressure dry oil-lubricated pump

The present invention relates to lubricant pump, relate in particular to the lubricant pump that refuels into the low-speed heave-load mechanical node.

At present, commercially available electronic high pressure dry oil lubrication pump, the node that has been widely used in low speed heavy burden machineries such as high pedestal jib crane, container handling system stacker-reclaimer, belt type conveyer, rolling mill refuels; Yet the dry oil pump of these a great varietys, because the defective on the project organization, the following fault of Chang Yin and can not to obtain the user satisfied.For example: adopt the cam pump of worm gear, worm screw, because its transmission is rigid transmission, in case oil circuit stops up, pressure will sharply raise, and causes mechanical failure; Because the speed change value is fixed, make volume read-out not be deficiency, be exactly excessive, be difficult to regulate; Because its output oil head is few, extend the oil transportation line length with regard to having to during multipoint refueling and use high pressure 40Mpa, cause pipe joint to burst apart or carries the saponification of drier oil to go bad; Charge oil pressure is low, needs with mobile better but expensive lithium grease lubricating grease.

At this situation, I in ZL99257004.2 " high pressure multi-dot hydraulic pressure dry oil lubrication pump ", the guide mechanism that has proposed to form, by several " high pressure multi-dot hydraulic pressure dry oil lubrication pumps " that are set to that drier oil basin that drier oil force feed mechanism that tens covers are made up of oil pressure plunger and oil pressure plunger cover, spring exert pressure, are located in the oil tank and constituted by pump piston that links with pilot spool and drier oil cylinder by the hydraulic pressure installation of bidirectional piston, by pilot spool and directional post plug sleeve.Show through model machine is on probation,, still have following point though this pump has had improvement than commercially available cammingly pump in many aspects:

1. because the event of pressure limiting eduction valve is set potential faults is not arranged in the bidirectional piston hydraulic pressure installation, though serious mechanical failure when taking place to stop up, oil circuit does not take place, because of not seeing that signal does not have in time to get rid of obstruction and makes some filling-up area failure of oil feed;

2. because being set respectively, drier oil do not enter the fuel-flow control mechanism that oil pressure plunger overlaps, so the drier oil output quantity can not be adjusted one by one by actual demand;

3. the pressure that provides of recharging oil device medi-spring reduces with the store oil amount and reduces; Impurity in the drier oil and bubble can't be got rid of the normal operation that has influenced lubricant pump;

4. in line check valve is unnecessary; Because of stressed quite even on the oily piston of a plurality of pressures on the hydraulic piston, the guide mechanism of being made up of pilot spool and directional post plug sleeve is unnecessary.

The objective of the invention is, various shortcoming and cause analysis thereof according to the above existing all kinds of dry oil lubrication pump, design and provide a kind of " hydraulically driven high-pressure multiple spot dry oil pump " of brand new, to eliminate the various shortcomings of having found in the use, for the user provides satisfied fully dry oil lubrication pump.

For achieving the above object, the present invention adopts following design proposal:

This hydraulically driven high-pressure dry oil-lubricated pump, comprises that by several drier oil grease press structures that hundred covers are made of oil pressure plunger and oil pressure plunger cover, of being set to drier oil filters and the pressure drier oil basin of backflow degasification mechanism and hydraulic piston constitutes at the hydraulic pressure installation that is made of bidirectional piston and oil cylinder.

Described hydraulic pressure installation, its oil cylinder is separated into upper and lower two grease chambeies by bidirectional piston, and this two grease chamber is provided with respectively that " the turnover oil pipe also communicates with pump and oil sump through solenoid directional control valve; It is characterized in that: the unidirectional eduction valve of rightabout pressure limiting that on piston, is provided with two parallel connections; Described two unidirectional eduction valves of pressure limiting also can be located at the mode of parallel connection between the upper and lower turnover oil pipe.

Described drier oil grease press structure, constitute by several hundred the cover oil pressure plunger and oil pressure plunger covers that can be separated from each other that are set to, described each oil pressure plunger one end be provided with annular flange flange and by become with it serial connection draw dish to be crimped on piston upper surface and constitute can the small angle beat and the cooperation of microdisplacement; Described oil pressure plunger constitutes isometric cylindricality, its bottom be provided with vertically upward and become sealed sliding plunger hole movingly with plunger, one apical pore that the whelk bolt was set is arranged at its top, and the bottom of this apical pore has a hole of extending downwards, and this hole and oil pressure plunger put the horizontal hole quadrature on the lower position; The inner of horizontal hole and plunger trepanning are orthogonal, and the plunger bushing outer wall of the outer end of horizontal hole is provided with gland, regulates bolt, and constitute the drier oil flow control valve by gland, adjusting bolt and horizontal hole; Described plunger bushing, on the wall of its higher position also two levels to and the hole that is mutually an angle of cut, this two Kong Junyu plunger trepanning is orthogonal, UNICOM, is provided with the unidirectional eduction valve of pressure limiting that is made of the porose gland in end, valve plug, spring on the plunger jacket wall of one outer end of hole; And the plunger jacket wall of another horizontal hole outer end is provided with the unidirectional outlet valve of the high pressure that is made of cap with holes, spring, valve plug and valve pocket; Described oil pressure plunger cover, its lower end is passed the perforate of oil hydraulic cylinder top cover and is fixed on the oil hydraulic cylinder top cover with nut seal, end face is provided with the pressing plate with each plunger bushing one sealing crimping on it, and this pressing plate is by crossing the top that the sealing of whelk bolt and clamping bolt is fastened on each plunger bushing.

Be tightly locked with the porose loam cake in indent center, bottom on the top of pressing plate, all whelk stoppers of crossing are being made of in the drier oil channel lumens loam cake inner fovea part and pressing plate, upwards are provided with the drier oil return tube that becomes sealed attachment with it on the loam cake center hole.Described hydraulic pressure drier oil basin, sealing is fixed in the top of loam cake, be provided with in its chamber with oil storage tank inner-wall and become sealed sliding annular piston movingly with drier oil return tube outer wall, and the basin inner chamber being separated into the drier oil storage chamber on top and the hydraulic jack of bottom by piston, hydraulic jack joins through duct, oil inlet pipe pressure-limit valve and the oil pump of loam cake; The oil tank top is provided with jar and becomes the loam cake of sealed attachment, on be covered with drier oil zerk and pressure gauge, it is that the air-breathing top cover of chewing of row is arranged at oil cleaner screen, top that its central part is provided with the bottom.

For making the person of readding to design proposal of the present invention and its rationality one clear understanding be arranged, details are as follows with accompanying drawing in conjunction with the embodiments now:

Fig. 1 is the structure and the working principle schematic representation of hydraulically driven high-pressure dry oil-lubricated pump of the present invention.

Hydraulic press starts, and the pressure thin oil in the oil hydraulic cylinder 1 is with about 20Kg/cm ²Pressure enter the cavity of resorption A that forms by piston 1.2 and cylinder body and will push away on the piston 1.2 through following oil pipe 1.1, the low pressure oil among the epicoele B is returned fuel tank through last oil pipe 1.4 and solenoid directional control valve; When hydraulic piston upwards moves to the top, solenoid directional control valve commutation, the pressure thin oil through selector valve, go up oil pipe 1.4 and enter piston upper chamber, and the thin oil in the cavity of resorption becomes low pressure oil and return fuel tank through oil pipe 1.1 selector valves down.In the upper and lower mobile process of piston, be fixed on piston 1.2 and draw the oil pressure plunger 2 on the dish 1.3 to be synchronized with the movement with piston 1.2; Because two pressure limiting eduction valves that direction is opposite are housed on piston 1.2, so the high pressure thin oil enters the low pressure oil pocket and returns fuel tank through oil pipe through one of two eduction valves when oil pressure is too high, avoided mechanism-trouble that above-mentioned design deficiency one caused and working life long consequence.

Owing to become equally distributed plunger 2, by drawing dish 1.3 to connect mutually with piston 1.2 with movable, and plunger 3 is minimum with plunger bushing 3 matching gaps that are fixed on cylinder body 1 top, so when plunger 2 moves downward, plunger bushing 3 top inner chambers form vacuum, and the pressure drier oil in the drier oil oil storage tank 7 enters top chamber E from epicoele D by oil cleaner screen 7.5 when plunger 2 end faces are displaced downwardly to the filler opening that is lower than flow control valve 3.1, and through returning oil pipe 7.3, channel lumens F between pressing plate 5 and the loam cake 6, cross whelk bolt 3.4, the filler opening of regulation valve body 3.2 enters the inner chamber of plunger bushing 3, and the influx of drier oil is to be controlled by the drier oil flow control valve that gland 3.2 adjusting bolts 3.1 and horizontal hole constitute; When compressing drier oil with piston 1.2 uplink synchronizations and after its end face is higher than filler opening, plunger 2 forms high pressure oil, the unidirectional outlet valve of high pressure that constitutes via cap 4.3 with holes, spring 4.4, valve plug 4.1 and valve pocket 4.2 is pressed into oil transport pipeline, transports to each filling-up area through distributor again.If stop up in case oil transport pipeline takes place, drier oil oil pressure in the oil pressure plunger mantle cavity rises and when surpassing setting value (as 30Mpa), the pressure that drier oil promptly overcomes spring 9.2 opens valve plug 9.1 and the perforate on valve seat 9 and its cap is flowed out, and has prevented the too high accident that causes of oil pressure.Because drier oil enters the oil mass of each oil pressure plunger inner chamber, all according to the adjusting of user machinery each filling-up area requirement oneself, so do not exist filling-up area to add shortage of oil or refuel excessive problem; Stop up even pipeline road takes place in the somewhere, because of the drier oil of excess pressure is discharged from the pressure limiting eduction valve of the oil pressure plunger cover that joins with this pipe immediately, so can avoid the fault that causes therefrom, and can determine to stop up oil circuit according to the earial drainage drier oil and in time get rid of obstruction.

As seen from the figure, the pressure of drier oil among the drier oil basin epicoele D is to be entered cavity of resorption C through pipeline 8 and duct and exerted pressure by piston 7.2 by the oil that limits pressure of oil pump output, and so pressure is comparatively stable, its force value is by pressure gauge 7.9 demonstrations.During the drier oil quantity not sufficient, can add by oil filler 7.7; When drier oil is full of the back and when pressure gauge is shown as 0, row's bleeding point 7.9 can connect air exhauster decompression and eliminate behind the bubble in the drier oil airtight.

Claims

1, a kind of hydraulically driven high-pressure dry oil-lubricated pump, comprise the hydraulic pressure installation that constitutes by bidirectional piston and oil cylinder, several drier oil grease press structure that hundred covers are made of oil pressure plunger and oil pressure plunger cover, pressure drier oil basin that has piston of being set to, it is characterized in that: described drier oil grease press structure, constitute by several hundred the cover oil pressure plunger and oil pressure plunger covers that can be separated from each other that are set to, described each oil pressure plunger one end be provided with annular flange flange and by become with it serial connection draw dish to be crimped on piston upper surface and constitute can the small angle beat and the cooperation of microdisplacement; Described oil pressure plunger constitutes isometric cylindricality, its bottom be provided with vertically upward and become sealed sliding plunger hole movingly with plunger, one apical pore that the whelk bolt was set is arranged at its top, and the bottom of this apical pore has a hole of extending downwards, and this hole and oil pressure plunger put the horizontal hole quadrature on the lower position; The inner of horizontal hole and plunger trepanning are orthogonal, and the plunger bushing outer wall of the outer end of horizontal hole is provided with gland, regulates bolt, and constitute the drier oil flow control valve by gland, adjusting bolt and horizontal hole; Described plunger bushing, on the wall of its higher position also two levels to and the hole that is mutually an angle of cut, this two Kong Junyu plunger trepanning is orthogonal, UNICOM, is provided with the unidirectional eduction valve of pressure limiting that is made of the porose gland in end, valve plug, spring on the plunger jacket wall of one outer end of hole; And the plunger jacket wall of another horizontal hole outer end is provided with the unidirectional outlet valve of the high pressure that is made of cap with holes, spring, valve plug and valve pocket; Described oil pressure plunger cover, its lower end is passed the perforate of oil hydraulic cylinder top cover and is fixed on the oil hydraulic cylinder top cover with nut seal, end face is provided with the pressing plate with each plunger bushing one sealing crimping on it, and this pressing plate is by crossing the top that the sealing of whelk bolt and clamping bolt is fastened on each plunger bushing.

2, hydraulically driven high-pressure dry oil-lubricated pump according to claim 1 is characterized in that, the piston of described hydraulic pressure installation which is provided with the unidirectional eduction valve of rightabout pressure limiting of two parallel connections; Described two unidirectional eduction valves of pressure limiting also can be located at the mode of parallel connection between the upper and lower turnover oil pipe.

3, hydraulically driven high-pressure dry oil-lubricated pump according to claim 1, it is characterized in that, the top of described pressing plate is tightly locked with the porose loam cake in indent center, bottom, all whelk stoppers of crossing are being made of in the drier oil channel lumens loam cake inner fovea part and pressing plate, upwards are provided with the drier oil return tube that becomes sealed attachment with it on the loam cake center hole; Described hydraulic pressure drier oil basin, sealing is fixed in the top of loam cake, be provided with in its chamber with oil storage tank inner-wall and become sealed sliding annular piston movingly with drier oil return tube outer wall, and the basin inner chamber being separated into the drier oil storage chamber on top and the hydraulic jack of bottom by piston, hydraulic jack joins through duct, oil inlet pipe pressure-limit valve and the oil pump of loam cake; The oil tank top is provided with jar and becomes the loam cake of sealed attachment, on be covered with drier oil zerk and pressure gauge, it is that the air-breathing top cover of chewing of row is arranged at oil cleaner screen, top that its central part is provided with the bottom.