CN201425495Y - Liquid volume flow meter for fuel tanker - Google Patents

Abstract

The utility model relates to a liquid volume flow meter for a fuel tanker, which comprises two cylinder pistons. The included angle of the axial lines of the piston cylinders with the two pistons is 120 degrees, the axial lines of the piston cylinders with the two pistons vertically crosses with the axial line of a main shaft, the pistons consist of a double-layers fluorine rubber cup arranged onthe back and a stainless steel skeleton used for fixing the double-layers fluorine rubber cup, an eccentric gear is arranged under a positioning seat, the lower end of an adjusting core shaft in the main shaft is engaged with the eccentric gear, the upper end of the adjusting core shaft is provided with a rotary adjusting seal sleeve, the upper end of the main shaft is provided with a bull gear, an upper cover is provided with a pinion gear, the bull gear and the pinion gear are engaged with each other, the side wall of a shell is provided with a fuel inlet, and a one-way valve is arranged atthe fuel inlet. The utility model has the advantages of simple structure, high metering accuracy and convenient adjustment.

Description

The liquid capacity formula flowmeter that is used for fuel charger

Technical field

The utility model belongs to measuring apparatus, is specifically related to a kind of liquid capacity formula flowmeter.

Background technology

At present, domestic fuel charger flowmeter, its piston seal mode has two kinds: a kind of is hard piston type, this mode is that the cast-iron piston of abutment surface chromium plating and the quality of fit of brass cylinder sleeve seal, cause the wearing and tearing of piston and cylinder sleeve easily, thereby occur to leak, and this wearing and tearing can't repair, cause integral body to scrap; Another kind is a soft piston type, this mode generally adopts the monolithic leather cup to add upper skeleton to be connected with connecting rod, is that elasticity and the cylinder sleeve by leather cup seals, owing to adopted the monolithic leather cup, when the pressure size of oil in the cylinder and pressure direction changed, pressure oil just can spill between leather cup and cylinder sleeve.The piston liquid meter of these two kinds of structures all is to promote piston motion by the pressure differential that oil forms in the piston both sides, reaches the metering purpose.

Mostly domestic existing fuel charger is to adopt four cylinder piston liquid meters, leak owing to more or less exist between piston and the piston cylinder, so the cylinder number is many more, and leakage rate is big more, and measuring accuracy is also low more.

When flowmeter because of foozle or use wearing and tearing, leak when causing the accuracy of measuring that skew takes place, just need adjust with the flow regulator of flowmeter.At present, flowmeter on the domestic fuel charger mostly adopts the passive modulation regulating device, promptly adds the throw of poston that a push rod shortens this cylinder on the cylinder cap of a certain cylinder, reaches the purpose of regulating the output oil mass, collision and phenomenon such as stuck can appear in this device, and range of adjustment is less.

Flowmeter belongs to a kind of chromacoder, and the accuracy of output signal conversion directly has influence on the overall performance of flowmeter, and the output signal conversion of present domestic flowmeter all is the mode that adopts the direct-connected flowmeter main shaft of pulse encoder.The shortcoming of this mode is that fuel charger depends on fully to the accuracy of identification of flowmeter output signal and the revolution umber of pulse of pulse encoder can't further improves accuracy of identification.

Its oil-in of flowmeter that domestic general fuel charger is used all is positioned at and covers, and when pressure oil enters distributor chamber, can directly impact divider, therefore has the generation of some uncertain factors such as sinuous flow, thereby influences measuring accuracy.

The content of utility model

For overcoming the above-mentioned shortcoming of existing liquid capacity formula flowmeter, the applicant improves through research, and another kind of simple in structure, the liquid capacity formula flowmeter that is used for fuel charger that measuring accuracy is high, easy to adjust is provided.

The technical solution of the utility model is as follows:

A kind of liquid capacity formula flowmeter that is used for fuel charger, the loam cake that comprises housing and top thereof, the housing side has oil-out, housing bottom has bottom, enclosure interior is provided with cavity, each orifice all is connected with the chamber lid, all be equipped with piston in each cavity, each piston connects the two-piston bar respectively, the two-piston bar is folded mutually, its centerline direction intersects, the other end of two-piston bar is installed on respectively in the duct on the housing sidewall, all have mounting hole on the two-piston bar, the folded bearing of two-phase in the offset assembly places the folded mounting hole of two-phase, the offset assembly upper end is connected with positioning seat, positioning seat is connected vertical main shaft lower end, the main shaft upper end passes the loam cake upper surface, the upper surface of housing is provided with valve plate, cavity between valve plate and the loam cake is a distributor chamber, has the pod apertures that is communicated with the enclosure interior cavity on the valve plate, divider be connected on the main shaft and and valve plate motive seal cooperation, be connected with spring between loam cake upper surface and the valve plate, described piston has two, and the axis angle of the piston cylinder of two pistons is 120 °, and with the axis normal of main shaft.

Its further technical scheme is:

Described piston is by the double-deck fluororubber leather cup of installing dorsad, and the stainless steel insert composition of fixing this bilayer fluororubber leather cup.

Under the described positioning seat eccentric gear is housed, is positioned at the lower end and the eccentric gear engagement of the adjusting mandrel of main shaft, regulate the mandrel upper end rotatable adjusting big envelope is housed.

Gear wheel is equipped with in described main shaft upper end, covers on described and pinion wheel is housed, both engagements.

The sidewall of described housing has oil-in.

Retaining valve is equipped with at described oil-in place.

Useful technique effect of the present utility model is:

The utility model adopts the two-cylinder piston mode, contrasts four cylinder piston modes, can eliminate the leakage of two piston cylinder pressure oils, thereby improves measuring accuracy, simplified structure.

Piston of the present utility model adopts double-deck fluororubber leather cup mounting means dorsad, and fixes with stainless steel insert.This structure, no matter how the pressure of cylinder inner carrier both sides oil size and pressure direction change, and have the fluororubber leather cup of a direction can seal pressure oil all the time, have reduced leakage widely, have improved measuring accuracy.

The utility model adopts active flow regulator, the positioning seat that eccentric gear is housed is fixed on the main shaft lower end, be positioned at the adjusting mandrel lower end gear and the eccentric gear engagement of main shaft, rotation is loaded on regulates the eccentric throw that adjusting big envelope in mandrel upper end can change eccentric gear, thus the purpose of regulating piston stroke.This regulative mode is simple and convenient, range of adjustment is big.

Of the present utility modelly adorn a gear wheel in main shaft upper end, its be contained in the pinion that covers, external pulse encoder is connected with pinion wheel, make the accuracy of identification raising of fuel charger to the flowmeter output signal.

The utility model moves to oil-in on the housing, and the pressure oil of oil pump output enters the distributor chamber that divider is housed behind the oil channel current stabilization like this, and can the not be under pressure direct impact of oil of divider has reduced the generation of uncertain factors such as sinuous flow.

In addition, retaining valve is equipped with at the place at oil-in, can reduce external disturbance such as rolling buffer brake increase that filling spout causes as automobile and the inaccurate situation of metering that causes, also can play the effect of protection the utility model internal works simultaneously.

Description of drawings

Fig. 1 is a main parallax stereogram of the present utility model.

Fig. 2 is that cut-open view is looked on a left side of the present utility model.

Fig. 3 is the A-A cut-open view of Fig. 1.

Fig. 4 is the assembling stereogram of piston rod.

Fig. 5 is the cut-open view of offset assembly structure.

Fig. 6 is the cut-open view of piston structure.

Embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is described further.

As Fig. 1, Fig. 2, shown in Figure 3, the utility model comprises the loam cake 11 on housing 15 and top thereof, and housing 15 sides have oil-out 12, and oil-out 12 belows have oil-in 13 on the housing 15, and retaining valve 14 is equipped with at oil-in 13 places.Bottom 1 is arranged at housing 15 bottoms, and housing 15 inside are provided with two cavities 29, and it is 120 ° that each orifice all is connected with the axis angle that is equipped with the piston cylinder 19 of 17, two pistons 17 of piston in 16, two cavities of chamber lid respectively.

See Fig. 3, Fig. 4, two pistons 17 are connected with piston rod 18b with piston rod 18a respectively, and piston rod 18a and piston rod 18b are folded mutually, and its center line is 120 ° of intersections, and the other end of piston rod 18a and piston rod 18b is installed on respectively in the duct 30 on housing 15 sidewalls.All have mounting hole on piston rod 18a and the piston rod 18b, the folded bearing 23 of the two-phase in the offset assembly 2 places the folded mounting hole of two-phase.See Fig. 5, offset assembly 2 comprises positioning seat 22, device locating shaft 25 in the positioning seat 22, the periphery of locating shaft 25 and positioning seat 22 lower device eccentric gears 24, the bearing 23 that the peripheral unit two-phase of the axle sleeve of eccentric gear 24 is folded.

See Fig. 2, main shaft 3 is installed on housing 15 and the loam cake 11 by bearing seal, and positioning seat 22 is connected vertical main shaft 3 lower ends, and main shaft 3 upper ends pass loam cake 11 upper surfaces, the axis normal of the axis of piston cylinder 19 and main shaft 3.The end face of housing 15 is provided with valve plate 4, cavity between valve plate 4 and the loam cake 11 is a distributor chamber 26, oil-in 13 is communicated with distributor chamber 26 by the oil-feed cavity in the housing 15, have the pod apertures 28 that is communicated with housing 15 inner cavities on the valve plate 4, divider 5 be connected on the main shaft 3 and and valve plate 4 motive seals cooperation, be connected with spring 6 between loam cake 11 upper surfaces and the valve plate 4.

See Fig. 2, Fig. 5, be positioned at the lower end and eccentric gear 24 engagements of the adjusting mandrel 8 of main shaft 3, regulate mandrel 8 upper ends rotatable adjusting big envelope 9 is housed.Gear wheel 7 is equipped with in main shaft 3 upper ends, on the described loam cake 11 pinion wheel 10 is housed, both engagements.

See Fig. 6, piston 17 is by the double-deck fluororubber leather cup of installing dorsad 20, and stainless steel insert 21 compositions of fixing this bilayer fluororubber leather cup 20.

Course of action of the present utility model is as follows: the pressure oil of oil pump output, enter oil-in 13 through retaining valve 14, enter distributor chamber 26 through the cavity in the housing 15, pod apertures 28 by valve plate 4 enters each plunger shaft (described each plunger shaft and above-mentioned oil-feed cavity are isolated), promoting piston 17 moves reciprocatingly, pressure oil enters the inner chamber of divider 5 by valve plate 4 other pod apertures 28 from plunger shaft, the interstitial hole of this inner chamber by valve plate 4 enters the oil road 27 in the housing 15, discharge from oil-out 12, above-mentioned course of action and structure are same as the prior art.Meanwhile, piston 17 drives piston rod 18a and piston rod 18b, piston rod 18a and piston rod 18b promote offset assembly 2 and make main shaft 3 rotations, drive gear wheel 7 rotations during main shaft 3 rotations, thereby make pinion wheel 10 rotations and provide the revolution value to output to pulse encoder, the ratio of gear of two gears is 1: 5, so obtains the variable of volume read-out.When demarcating flowmeter or when skew takes place the accuracy of measuring flowmeter adjusted, active flow regulation uses, its working method is to rotate the adjusting big envelope 9 of regulating the mandrel upper end, make and regulate mandrel 8 rotations, driving eccentric gear 24 rotates, making it eccentric throw changes, thereby reach the purpose that changes piston 17 strokes, regulates flow, adjustment finishes to regulate big envelope 9 and is pressed into main shaft 3 lockings.

Above-described only is preferred implementation of the present utility model, and the utility model is not limited to above embodiment.Be appreciated that those skilled in the art under the prerequisite that does not break away from spirit of the present utility model and design, can make other improvement and variation.

Claims (6)

1. liquid capacity formula flowmeter that is used for fuel charger, the loam cake (11) that comprises housing (15) and top thereof, housing (15) side has oil-out (12), bottom (1) is arranged at housing (15) bottom, housing (15) inside is provided with cavity (29), each cavity (29) mouth all is connected with chamber lid (16), all be equipped with piston (17) in each cavity (29), each piston (17) connects piston rod (18a) and piston rod (18b) respectively, piston rod (18a) is folded mutually with piston rod (18b), its centerline direction intersects, the other end of piston rod (18a) and piston rod (18b) is installed on respectively in the duct (30) on housing (15) sidewall, all have mounting hole on piston rod (18a) and the piston rod (18b), the folded bearing (23) of two-phase in the offset assembly (2) places the folded mounting hole of two-phase, offset assembly (2) upper end is connected with positioning seat (22), positioning seat (22) is connected vertical main shaft (3) lower end, main shaft (3) upper end passes loam cake (11) upper surface, the upper surface of housing (15) is provided with valve plate (4), cavity between valve plate (4) and the loam cake (11) is distributor chamber (26), have the pod apertures (28) that is communicated with the inner cavity of housing (15) on the valve plate (4), divider (5) is connected also last and valve plate (4) the motive seal cooperation of main shaft (3), be connected with spring (6) between loam cake (11) upper surface and the valve plate (4), it is characterized in that: described piston (17) has two, the axis angle of the piston cylinder (19) of two pistons (17) is 120 °, and with the axis normal of main shaft (3).

2. the liquid capacity formula flowmeter that is used for fuel charger as claimed in claim 1, it is characterized in that: described piston (17) is by the double-deck fluororubber leather cup of installing dorsad (20), and stainless steel insert (21) composition of fixing this bilayer fluororubber leather cup (20).

3. the liquid capacity formula flowmeter that is used for fuel charger as claimed in claim 1, it is characterized in that: eccentric gear (24) is housed under the described positioning seat (22), be positioned at the lower end and eccentric gear (24) engagement of the adjusting mandrel (8) of main shaft (3), regulate mandrel (8) upper end rotatable adjusting big envelope (9) is housed.

4. the liquid capacity formula flowmeter that is used for fuel charger as claimed in claim 1 is characterized in that: gear wheel (7) is equipped with in described main shaft (3) upper end, and pinion wheel (10) is housed on the described loam cake (11), both engagements.

5. the liquid capacity formula flowmeter that is used for fuel charger as claimed in claim 1, it is characterized in that: the sidewall of described housing (15) has oil-in (13).

6. the liquid capacity formula flowmeter that is used for fuel charger as claimed in claim 5, it is characterized in that: described oil-in (13) locates to be equipped with retaining valve (14).

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