CN113324606A - Fold and roll type pair two dimension piston dynamic flowmeter - Google Patents

Fold and roll type pair two dimension piston dynamic flowmeter Download PDF

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Publication number
CN113324606A
CN113324606A CN202110581240.5A CN202110581240A CN113324606A CN 113324606 A CN113324606 A CN 113324606A CN 202110581240 A CN202110581240 A CN 202110581240A CN 113324606 A CN113324606 A CN 113324606A
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China
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axial
piston
hole
liquid
shell
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CN202110581240.5A
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CN113324606B (en
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丁川
陈豪奇
章立超
奚其昌
阮健
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Zhejiang University of Technology ZJUT
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Zhejiang University of Technology ZJUT
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F11/00—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it
    • G01F11/02—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers which expand or contract during measurement
    • G01F11/04—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers which expand or contract during measurement of the free-piston type
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/14—Casings, e.g. of special material
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/18—Supports or connecting means for meters

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)

Abstract

The invention discloses a stacked rolling duplex two-dimensional piston type dynamic flowmeter, wherein a liquid inlet is formed in a left shell, a liquid outlet is formed in a right shell, a left metering unit is arranged in the left shell, a right metering unit is arranged in the right shell, the left shell is used for feeding liquid and discharging liquid through the left metering unit, and the right shell is used for feeding liquid and discharging liquid through the right metering unit; the left metering unit comprises a left piston, the right metering unit comprises a right piston, and the left piston and the right piston are connected through a rolling type transmission device which allows the left piston and the right piston to keep synchronous rotation and relatively independently move axially; the left piston is connected with a left speed sensor assembly for detecting the axial speed of the left piston, and the right piston is connected with a right speed sensor assembly for detecting the axial speed of the right piston; the central processing unit calculates the flow according to the left speed signal and the right speed signal; the invention adopts the speed sensor to measure the flow, the output signal is in direct proportion to the flow signal, the linearity is high, and the response frequency is high.

Description

Fold and roll type pair two dimension piston dynamic flowmeter
Technical Field
The invention relates to the technical field of flowmeters, in particular to a stacking-rolling duplex two-dimensional piston type dynamic flowmeter.
Background
The positive displacement flowmeter has high metering precision, is slightly influenced by the viscosity and the flow state of a fluid, and is widely applied to the fields of aerospace ships, mechanical and electrical integration, chemical engineering and the like. Piston type flowmeters are classified into rotary piston type flowmeters and reciprocating piston type flowmeters as high-precision positive displacement flowmeters according to the motion mode of a piston. The reciprocating piston type flowmeter has a complex structure and is commonly used in a refueling mechanism of a gas station. The rotary piston type flowmeter has a simple structure, allows a certain leakage flow to reduce abrasion and improve anti-pollution capacity, but sacrifices measurement accuracy, and can be used for measuring liquid such as water, liquid food and the like.
In the prior art, a plurality of magnetic steels are arranged on a rotating part (such as a piston) at equal intervals along the circumferential direction, a Hall element is arranged on a fixed part (a shell), and the magnetic steels and the Hall element interact to send out pulse signals. In the circumferential rotation process, when the magnetic steel rotates for a certain angle, the magnetic steel can be aligned with the Hall element, and the Hall element can correspondingly send out a voltage pulse signal to mark the number of liquid flow in unit volume, so that the liquid flow is measured. However, the number of the magnetic steels is limited, so that hysteresis exists in dynamic flow reading of the flowmeter.
Therefore, the above prior art has at least the following technical problems: there is hysteresis in the prior art volumetric flow meter dynamic flow reading.
Disclosure of Invention
The embodiment of the application provides a fold and roll type pair two-dimensional piston dynamic flowmeter, has solved among the prior art technical problem that there is hysteresis quality in volumetric flowmeter dynamic flow reading.
In order to solve the above problems, an embodiment of the present application provides a stacked rolling type duplex two-dimensional piston dynamic flowmeter, where the flowmeter includes a left casing, a connecting casing, and a right casing, where central axes of the left casing and the right casing are coincident, the left casing and the right casing are hermetically communicated through the connecting casing, a liquid inlet is formed in the left casing, and a liquid outlet is formed in the right casing; defining one end of the left shell as a left end, one end of the right shell as a right end, wherein the axial direction is the direction of the central shaft or the direction parallel to the central shaft, the axial symmetry refers to the symmetry with the central shaft, the radial direction refers to the direction of the diameter of the cross section of the connecting shell, and the circumferential direction is the direction around the central shaft;
a left metering unit is arranged in the left shell, a right metering unit is arranged in the right shell, the left shell is used for feeding liquid and discharging liquid through the left metering unit, and the right shell is used for feeding liquid and discharging liquid through the right metering unit;
the left metering unit comprises a left cylinder body coaxially arranged in the left shell, and the right metering unit comprises a right cylinder body coaxially arranged in the right shell; a left piston is coaxially arranged in the left cylinder body, a right piston is coaxially arranged in the right cylinder body, the left piston and the right piston are connected through a rolling type transmission device which allows the left piston and the right piston to keep synchronous rotation and relatively independently move axially, and the rolling type transmission device is arranged in an inner cavity of the connecting shell;
the left end and the right end of the left piston are respectively connected with a concentric ring, a first shoulder is arranged in the middle of the left piston, and the first shoulder and the concentric rings divide an inner cavity of the left cylinder body into a closed first left chamber and a closed first right chamber; four first left axial grooves and four first right axial grooves are circumferentially and equally spaced on the first shoulder, and the first left axial grooves and the first right axial grooves are alternately arranged on the circumference of the cross section of the left piston at equal intervals, wherein: the first left axial slot is in communication with the first left chamber and the first right axial slot is in communication with the first right chamber;
the left end and the right end of the right piston are respectively connected with another pair of the concentric rings, a second shoulder is arranged in the middle of the right piston, and the inner cavity of the right cylinder body is divided into a closed second left cavity and a closed second right cavity by the second shoulder and the concentric rings on the right piston; four second left axial grooves and four second right axial grooves are circumferentially and equally spaced on the second shoulder, and the second left axial grooves and the second right axial grooves are alternately arranged on the circumference of the cross section of the right piston at equal intervals, wherein: the second left axial slot is communicated with a second left chamber, and the second right axial slot is communicated with a second right chamber;
the left piston is connected with a left speed sensor assembly for detecting the axial speed of the left piston, and the right piston is connected with a right speed sensor assembly for detecting the axial speed of the right piston; the left speed sensor assembly and the right speed sensor assembly are respectively connected with a central processing unit, the central processing unit receives a left speed signal sent by the left speed sensor assembly and a right speed signal sent by the right speed sensor assembly, and calculates flow according to the left speed signal and the right speed signal;
the stacking and rolling type transmission device is arranged in the connecting shell and comprises a connecting assembly, a cone roller assembly and a guide rail assembly, and two ends of the connecting assembly are respectively connected with the left piston and the right piston; the two ends of the connecting assembly are respectively provided with the guide rail assemblies, the cone roller assemblies are arranged in the middle of the connecting assembly, and the outer guide rail and the inner guide rail of each cone roller assembly are matched with the rolling surfaces of the guide rail assemblies;
the connecting assembly comprises an outer shaft connected with the left piston and an inner shaft connected with the right piston, the outer shaft and the inner shaft are axially slidably arranged on a cross shaft, and the projection of the cross shaft in the direction of the central shaft is in a cross shape;
the outer shaft comprises an outer shaft body, two axisymmetric first shaft arms forming a fork opening are arranged on the right side of the outer shaft body, a first slide fastener extending along the radial direction is arranged at the left end of each first shaft arm, a second slide fastener extending along the radial direction is arranged at the right end of each first shaft arm, and a first lock catch connected with the left piston is arranged at the left end of the outer shaft body;
the inner shaft comprises an inner shaft body, two axisymmetric second shaft arms forming a fork opening are arranged on the left side of the inner shaft body, a third slide fastener extending along the radial direction is arranged at the right end of each second shaft arm, a fourth slide fastener extending along the radial direction is arranged at the right end of each second shaft arm, and a second lock catch connected with the right piston is arranged at the right end of the inner shaft body;
the outer shaft and the inner shaft are crossed and arranged on the cross shaft in a crossing mode, and the first shaft arm and the second shaft arm can move on the cross shaft along the direction of the central shaft and can rotate along the circumferential direction;
the cone roller assembly comprises a roller stacking shell sleeved on the first shaft arm and the second shaft arm, a first concave annular groove is formed in the connecting shell, a second concave annular groove is formed in the middle of the roller stacking shell, and the first annular groove and the second annular groove are buckled to form a high-pressure cavity; four left tapered holes inclining to the right are formed in the left end of the stacking roller shell at equal intervals along the circumferential direction, four right tapered holes inclining to the left are formed in the right end of the stacking roller shell at equal intervals along the circumferential direction, and the left tapered holes and the right tapered holes are alternately arranged; an included angle between the central axis of the left conical hole and the central axis is equal to an included angle between the central axis of the right conical hole and the central axis, and conical rollers are rotatably arranged in the left conical hole and the right conical hole;
the guide rail assembly comprises an outer guide rail and an inner guide rail, rolling surfaces of the outer guide rail and the inner guide rail are both axial annular curved surfaces, the curved surfaces have axial fluctuation, projections of the outer guide rail and the inner guide rail in the direction of the central shaft are annular, the curved surfaces are alternately provided with 4 highest points and 4 lowest points at equal intervals, the highest points and the lowest points are respectively positioned on four diameters of the annular, and the curved surfaces are respectively symmetrical according to the four diameters;
the outer guide rails are fixedly arranged at two ends of the outer shaft, the inner guide rails are fixedly arranged at two ends of the inner shaft, the inner diameter of the outer guide rails is slightly larger than the outer diameter of the inner guide rails, the inner ring sides of the outer guide rails and the inner guide rails are higher than the outer ring sides, and the conical surfaces of the conical rollers are matched with the rolling surfaces of the outer guide rails and the inner guide rails; the conical roller rolls on the corresponding rolling surface and pushes the left piston and the right piston to move along the axial direction;
a left third axial hole is formed in the left shell, and a left fourth axial hole, a left fifth axial hole, a left sixth axial hole, a left seventh axial hole, a left first radial hole for connecting the left third axial hole and the left sixth axial hole, and a left second radial hole for connecting the left third axial hole and the left fifth axial hole are respectively formed in the shell wall of the left shell; a left first annular groove and a left second annular groove are respectively formed in the inner surface of the left third axial hole; the left first annular groove and the outer peripheral surface of the left cylinder body are enclosed to form a left liquid inlet cavity, and the left second annular groove and the outer peripheral surface of the left cylinder body are enclosed to form a left liquid outlet cavity;
a right third axial hole is formed in the right shell, and a right fourth axial hole, a right fifth axial hole, a right sixth axial hole, a right seventh axial hole, a right first radial hole for connecting the right third axial hole and the right fifth axial hole, a right second radial hole for connecting the right fourth axial hole and the right third axial hole, and a right third radial hole for connecting the right third axial hole and the right seventh axial hole are formed in the shell wall of the right shell; a right first annular groove and a right second annular groove are respectively formed in the inner surface of the right third axial hole; the right first annular groove and the outer peripheral surface of the right cylinder body are enclosed to form a right liquid inlet cavity, and the right second annular groove and the outer peripheral surface of the right cylinder body are enclosed to form a right liquid outlet cavity;
a middle axial through hole is formed in the connecting shell, a first axial connecting hole communicated with a left fourth axial hole and a right fourth axial hole, a second axial connecting hole communicated with a left fifth axial hole and a right fifth axial hole, a third axial connecting hole connected with a left seventh axial hole, a fourth axial connecting hole connected with a right seventh axial hole, a first radial connecting hole connected with the middle axial through hole and the third axial connecting hole, and a second radial connecting hole connected with the middle axial through hole and the fourth axial connecting hole are formed in the shell wall of the connecting shell; the surface of the middle axial through hole is provided with a middle first annular groove;
the left cylinder body is provided with four left liquid inlet windows communicated with the first left axial groove or the first right axial groove, the left cylinder body is also provided with four left liquid outlet windows communicated with the first left axial groove or the first right axial groove, and the left liquid inlet windows and the left liquid outlet windows are alternately distributed on the circumference of the left cylinder body at equal intervals;
the right cylinder body is provided with four right liquid inlet windows communicated with the second left axial groove or the second right axial groove, the right cylinder body is also provided with four right liquid outlet windows communicated with the second left axial groove or the second right axial groove, and the right liquid inlet windows and the right liquid outlet windows are alternately distributed on the circumference of the right cylinder body at equal intervals;
the liquid inlet, the left liquid inlet cavity and the left liquid inlet window are sequentially connected to form a liquid inlet channel of the left metering unit; the left liquid outlet window, the left liquid outlet cavity, the left second radial hole, the left fifth axial hole, the second axial connecting hole, the right fifth axial hole, the right first radial hole, the right liquid outlet cavity and the liquid outlet are sequentially connected to form a liquid outlet channel of the left metering unit;
the liquid inlet, the left fourth axial hole, the first axial connecting hole, the right fourth axial hole, the right second radial hole, the right liquid inlet cavity and the right liquid inlet window are sequentially connected to form a liquid inlet channel of the right metering unit; the right liquid outlet window, the right liquid outlet cavity and the liquid outlet form a liquid outlet channel of the right metering unit;
high-pressure oil is filled in a high-pressure cavity on the outer side of the roller stacking shell during working; the liquid inlet, the left liquid inlet cavity, the left first radial hole, the left sixth axial hole, the left seventh axial hole, the third axial connecting hole and the first radial connecting hole are sequentially connected to form a first high-pressure channel;
the liquid outlet, the right liquid outlet cavity, the right sixth axial hole, the right seventh axial hole, the right second axial hole, the fourth axial connecting hole and the second radial connecting hole are sequentially connected to form a second high-pressure channel;
the waveshapes of the curved surface fluctuation of the outer guide rails positioned at the two ends of the outer shaft are mutually in phase and are symmetrical about the central cross section of the roller stacking shell; the waveshapes of the curved surfaces of the inner guide rails positioned at the two ends of the inner shaft are in phase with each other and are symmetrical about the central cross section of the laminated roller shell; the outer guide rail and the inner guide rail at the same end are arranged by being staggered by 22.5 degrees along the circumferential direction, namely: the phase of the curved waveform on the outer guide rail and the inner guide rail at the left end is 22.5 degrees, and the phase of the curved waveform on the outer guide rail and the inner guide rail at the right end is 22.5 degrees;
the positions of the first left axial groove, the first right axial groove, the second left axial groove and the second right axial groove and the left liquid inlet window, the left liquid outlet window, the right liquid inlet window and the right liquid outlet window are in the following corresponding relations:
in a first state:
in the right cylinder body, liquid drives the right piston to move rightwards, and the right piston moves through the inner guide rail and the rolling type transmission device to force the lower part to rotate along the circumferential direction; the second left axial groove is aligned with the right liquid inlet window, and the second right axial groove is aligned with the right liquid outlet window; the second left chamber sequentially enters liquid through the liquid inlet channel of the right metering unit and the second left axial groove, and the second right chamber sequentially discharges liquid through the second right axial groove and the liquid discharge channel of the right metering unit;
in the left cylinder body, a left piston rotates in the circumferential direction under the drive of a right piston and moves along the axial direction under the force of the outer guide rail and the overlapped rolling type transmission device; the first left axial groove is not communicated with the left liquid inlet window or the left liquid outlet window, the first right axial groove is not communicated with the left liquid inlet window or the left liquid outlet window, the first left chamber is not used for liquid inlet or liquid discharge, and the first right chamber is not used for liquid inlet or liquid discharge;
in the second state:
in the left cylinder body, liquid drives the left piston to move rightwards, and the left piston moves on the outer guide rail and the rolling type transmission device to force the lower part to rotate along the circumferential direction; the first left axial groove is aligned with the left liquid inlet window, and the first right axial groove is aligned with the left liquid outlet window; the first left chamber sequentially enters liquid through a liquid inlet channel of the left metering unit and the first left axial groove, and the first right chamber sequentially discharges liquid through the first right axial groove and a liquid discharge channel of the left metering unit;
in the right cylinder body, the right piston is driven by the left piston to rotate along the circumferential direction, and the inner guide rail and the rolling type transmission device move to force the lower part to move leftwards along the axial direction; the second left axial groove is not communicated with the right liquid inlet window or the right liquid outlet window, and the second right axial groove is not communicated with the right liquid inlet window or the right liquid outlet window; the second left chamber is neither liquid nor liquid, and the second right chamber is neither liquid nor liquid;
in the third state:
in the right cylinder body, liquid drives the right piston to move leftwards, and the right piston moves through the inner guide rail and the rolling type transmission device to force the lower part to rotate along the circumferential direction; the second right axial groove is aligned with the right liquid inlet window, and the second left axial groove is aligned with the right liquid outlet window; the second right chamber sequentially enters liquid through a liquid inlet channel of the right metering unit and the second right axial groove; the second left chamber discharges liquid through a second left axial groove and a liquid discharge channel of the right metering unit in sequence;
in the left cylinder body, a left piston circumferentially rotates under the driving of a right piston and axially moves leftwards under the driving of an outer guide rail and a rolling type transmission device; the first left axial groove is not communicated with the left liquid inlet window or the left liquid outlet window, the first right axial groove is not communicated with the left liquid inlet window or the left liquid outlet window, the first left chamber is not used for liquid inlet or liquid discharge, and the first right chamber is not used for liquid inlet or liquid discharge;
in the fourth state:
in the left cylinder body, liquid drives the left piston to move leftwards, and the left piston is forced to rotate downwards along the circumferential direction by the movement of the outer guide rail and the overlapping and rolling type transmission device; the first left axial groove is aligned with the left liquid outlet window, and the first right axial groove is aligned with the left liquid inlet window; the first right chamber sequentially enters liquid through a liquid inlet channel of the left metering unit and the first right axial groove, and the first left chamber sequentially discharges liquid through the first left axial groove and a liquid discharge channel of the left metering unit;
in the right cylinder body, the right piston rotates in the right cylinder body along the circumferential direction under the driving of the left piston, and the inner guide rail and the folding-rolling type transmission device move to force the lower part to move rightwards along the axial direction; the second left axial groove is not communicated with the right liquid inlet window or the right liquid outlet window, and the second right axial groove is not communicated with the right liquid inlet window or the right liquid outlet window; the second left chamber neither feeds nor discharges liquid, and the second right chamber neither feeds nor discharges liquid.
Furthermore, a concentric ring inner hole for the left piston or the right piston to insert and move is formed in the central shaft of the concentric ring, positioning grooves are formed in the circumferential surface of the concentric ring, four left radial positioning through holes are formed in the inner wall surface of the left cylinder body at intervals, four right radial positioning through holes are formed in the inner wall surface of the right cylinder body at intervals, and the left radial positioning through holes and the right radial positioning through holes are fixedly connected with the corresponding positioning grooves in the concentric ring through positioning pins, so that the concentric ring can be axially positioned in the left cylinder body or the right cylinder body.
Furthermore, the left liquid inlet window and the left liquid outlet window are rectangular inclined holes, and the adjacent left liquid inlet window and the left liquid outlet window are circumferentially spaced by 45 degrees and axially and respectively bifurcated left and right to form an included angle of 90 degrees;
the right side feed liquor window with the right side play liquid window is the rectangle inclined hole, and is adjacent the right side feed liquor window with the right side play liquid window is along circumference interval 45, and control the bifurcation respectively along the axial and be 90 contained angles.
Further, the left cylinder body is in interference fit with a left third axial hole of the left shell, and the left piston is in clearance fit with a left cylinder body inner hole of the left cylinder body; the right cylinder body is in interference fit with a right shell inner hole of the right shell, and the right piston is in clearance fit with a right cylinder body inner hole of the right cylinder body;
the first shoulder is provided with two first left radial communication holes for respectively communicating the two axisymmetric first left axial grooves, and the first shoulder is also provided with two first right radial communication holes for respectively communicating the two axisymmetric first right axial grooves; the second shoulder is provided with two second left radial communication holes for respectively communicating the two axisymmetric second left axial grooves, and the second shoulder is also provided with two second right radial communication holes for respectively communicating the two axisymmetric second right axial grooves.
Furthermore, a first one-way valve is arranged in the left seventh axial hole, and the working port faces to the left sixth axial hole; and a second one-way valve is arranged in the sixth right axial hole, and the working port faces to the seventh right axial hole.
Furthermore, the cross shaft comprises four plate bodies which are vertically intersected to form the cross shape, two sides of each plate body are recessed to form elongated slots, and ball strips are arranged in the eight elongated slots;
the inboard of first shaft arm is equipped with the edge first V type slide that the center pin direction extends, the inboard of second shaft arm is equipped with the edge second V type slide that the center pin direction extends, be equipped with the ball on the ball strip, the ball rotationally pastes and establishes corresponding first V type slide or on the second V type slide.
Furthermore, a left flat groove is formed in the left end of the left piston, and the first lock catch is buckled on the left flat groove; the left end of the right piston is provided with a right flat groove, and the second lock catch is buckled on the right flat groove.
Further, the awl gyro wheel has the conical surface, have awl gyro wheel cavity in the awl gyro wheel, the one end fixed insertion of awl gyro wheel axle awl gyro wheel cavity, the other end rotationally passes fold left bell mouth or right bell mouth on the gyro wheel casing and be connected with the gyro wheel cover that prevents the slippage, just the gyro wheel cover is detained and is established left side bell mouth or on the step face of right bell mouth.
Furthermore, the wall surface of the inner ring of the outer guide rail is provided with first sliding buckle grooves, and the first sliding buckle grooves of the two outer guide rails are respectively embedded with a first sliding buckle and a second sliding buckle on the outer shaft;
and the ring surface of the inner wall of the inner guide rail is provided with second sliding buckle grooves, and the second sliding buckle grooves on the two inner guide rails are respectively embedded with a third sliding buckle and a fourth sliding buckle on the inner shaft.
Furthermore, a left first axial hole and a left second axial hole are formed in the left end face of the left shell; a right first axial hole and a right second axial hole are formed in the right end face of the right shell;
the left sensor assembly comprises a left knob, a left coil framework, a left isolation sleeve and a left permanent magnet; wherein: the left knob is fixedly connected with the left shell through threads, the left coil framework is tightly pressed in the left first axial hole through the left knob, the left permanent magnet is axially movably sleeved in the left isolation sleeve, and the right end of the left permanent magnet penetrates through the left second axial hole and is fixedly connected with the left end face of the left piston through a bolt, so that the left permanent magnet and the left piston keep synchronous motion;
the structure of the right sensor assembly is the same as that of the left sensor assembly, and the right sensor assembly comprises a right knob, a right coil framework, a right isolation sleeve and a right permanent magnet; wherein: the right knob is fixedly connected with the right shell through threads, the right coil framework is tightly pressed in the right first axial hole through the right knob, the right permanent magnet is sleeved in the right isolation sleeve in an axially movable mode, and the right end of the right permanent magnet penetrates through the right second axial hole and is fixedly connected with the right end face of the right piston through a bolt, so that the right permanent magnet and the right piston keep synchronous motion.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
(1) in the embodiment of the application, the left end of the left piston 5 is connected with a left speed sensor assembly 1 for detecting the axial speed of the left piston 5, and the right end of the right piston 17 is connected with a right speed sensor assembly 18 for detecting the axial speed of the right piston 17; left side velocity sensor subassembly 1 with right side velocity sensor subassembly 18 is connected with central processing unit respectively, central processing unit receives left speed signal that left side velocity sensor subassembly 1 sent with right speed signal that right side velocity sensor subassembly 18 sent, and according to left side speed signal with right speed signal calculates the flow, adopts speedtransmitter, and output signal is directly proportional with flow signal, and the linearity is high, response frequency is high, has solved among the prior art technical problem that there is the hysteresis quality in the reading of positive displacement flowmeter dynamic flow, has realized the beneficial effect of the real-time reading of dynamic flow.
(2) In the embodiment of the application, the left metering unit and the right metering unit are connected by adopting the overlapping and rolling type transmission device, so that the left piston 5 of the left metering unit and the right piston 17 of the right metering unit can synchronously rotate and relatively independently axially move; the axial fixation of the overlapping-rolling type transmission device is realized through high-pressure oil static pressure support, so that the conical roller is always attached to the curved surface of the guide rail, no gap is generated, the flow measurement precision can be improved, the overlapping-rolling type transmission device has self-adaptive capacity, the overlapping roller is more firmly fixed along with the rise of the pressure of liquid to be measured, and the flow measurement of the high-pressure liquid can be realized; the radial fixation of the roller is realized by the compression between the rollers, the use of a rolling bearing is cancelled, and the vibration caused by the bearing clearance when the rotating speed is increased is avoided.
(3) In the embodiment of the application, the outer guide rail 9 and the inner guide rail 10 are alternately provided with 4 highest points T1 and 4 lowest points T2, the four-wave crest-four-wave trough inner and outer guide rail structures are adopted, the left piston 5 and the right piston 17 rotate circumferentially for one circle to perform four times of axial reciprocating motions, namely eight times of oil suction and discharge are realized, the cross-sectional area of the pistons can be reduced under the condition of the same discharge capacity, and the response speed of the flowmeter is improved.
(4) The embodiment of the application adopts a duplex structure of linkage of the left metering unit and the right metering unit, and a 22.5-degree circumferential corner phase difference exists between the front duplex structure and the rear duplex structure, so that the flow of the fluid to be measured discharged by the left metering unit and the right metering unit of the flowmeter can be completely eliminated in theory after being superposed, and meanwhile, the rotation direction of a piston of the flowmeter can be kept unchanged, thereby being beneficial to solving the problem of large flow pulsation of a liquid outlet of a volumetric flowmeter in the prior art and being beneficial to the measurement accuracy of the invention.
(5) Left sensor module 1 and right sensor module 18 have all set up the isolation cover in the embodiment of this application, the isolation cover structure will await measuring liquid and sensor coil skeleton keep apart for the flowmeter can work under higher pressure.
(6) In the embodiment of the present application, the first check valve 15 is disposed in the left seventh axial hole 211, and the working end P1 is facing the left sixth axial hole 210; the second check valve 15 is arranged in the sixth right axial hole (1611), the working end P1 is towards the seventh right axial hole 1610, and the two embedded check valves are arranged in opposite directions, so that high-pressure oil is always filled in a high-pressure cavity on the outer side surface of the roller overlapping shell when bidirectional flow is measured.
(7) The piston of this application embodiment adoption two degree of freedom structures compares simple structure in traditional piston flowmeter, can realize the measurement of two-way flow to reduce the whole volume of flowmeter greatly.
(8) The shape of the outer guide rail and the inner guide rail adopted by the embodiment of the application enables the left piston or the right piston to meet the law of deceleration motion such as axial equal acceleration, namely in each motion interval, in the front half section of the interval, the left piston or the right piston accelerates with the same acceleration, in the rear half section of the interval, the left piston or the right piston decelerates with the same deceleration, so that the left piston or the right piston moves leftwards and rightwards to have the same acceleration curve, and the axial motion of the piston is clear and controllable.
(9) The first shoulder is provided with two first left radial communication holes 501 for respectively communicating the two axisymmetric first left axial grooves a, and the first shoulder is also provided with two first right radial communication holes 502 for respectively communicating the two axisymmetric first right axial grooves b; the second shoulder is provided with two second left radial communication holes 1701 for respectively communicating the two axisymmetric second left axial grooves d, and the second shoulder is also provided with two second right radial communication holes 1702 for respectively communicating the two axisymmetric second right axial grooves c, so that the liquid to be measured flows after being converged, the flow field of the liquid to be measured is more stable, the pressure loss between the inlet and the outlet of the liquid to be measured is reduced, and the problem of overlarge pressure drop of the inlet and the outlet of the conventional positive displacement flowmeter is favorably solved.
Drawings
Fig. 1 is a 90 ° cross-sectional view of a tandem two-dimensional piston dynamic flow meter of a roll-on-roll type according to an embodiment of the present application, in which X represents a rotation direction;
FIG. 2 is a cross-sectional view of a left sensor unit in an embodiment of the present application;
FIG. 3 is a schematic diagram of a concentric ring configuration according to an embodiment of the present application;
FIG. 4 is a sectional view of the left housing, the connecting housing, and the right housing according to an embodiment of the present disclosure;
FIG. 5 is a sectional view taken along line B-B of FIG. 4;
FIG. 6 is a 135 cross-sectional view of the left cylinder block in an embodiment of the present application;
FIG. 7 is a schematic structural diagram of a left piston according to an embodiment of the present disclosure;
FIG. 8 is a schematic structural view of an outer shaft;
FIG. 9 is a schematic structural view of an outer rail according to an embodiment of the present application;
FIG. 10 is a schematic view of an inner rail structure according to an embodiment of the present application;
FIG. 11 is a schematic view of a stacked roller actuator according to an embodiment of the present application;
FIG. 12 is a schematic view of a stack roller housing according to an embodiment of the present disclosure;
FIG. 13 is a schematic view of an inner shaft according to an embodiment of the present application;
FIG. 14 is a 135 cross-sectional view of the right cylinder block in an embodiment of the present application;
FIG. 15 is a schematic view of a central shaft according to an embodiment of the present application;
FIG. 16 is a cross-sectional view of the flowmeter shown in a zero position in an embodiment of the present application;
FIG. 17a is a cross-sectional view of the flowmeter of FIG. 16 taken along the direction D-D at 0 or 90 with the left piston in one embodiment of the present application;
FIG. 17b is a cross-sectional view of the flowmeter of FIG. 16 taken along the direction C-C at 0 or 90 with the right piston in one embodiment of the present application;
FIG. 18a is a cross-sectional view of the flowmeter of FIG. 16 taken along line D-D at 22.5 for the left piston in an embodiment of the present application;
FIG. 18b is a cross-sectional view of the flowmeter of FIG. 16 taken along C-C at 22.5 with the right piston in one embodiment of the present application;
FIG. 19a is a cross-sectional view of the flowmeter of FIG. 16 taken along line D-D at 45 for the left piston in an embodiment of the present application;
FIG. 19b is a cross-sectional view of the flowmeter of FIG. 16 taken at 45 of the right piston in one embodiment of the present application;
FIG. 20a is a cross-sectional view of the flowmeter of FIG. 16 taken along line D-D at 67.5 for the left piston in an embodiment of the present application;
FIG. 20b is a cross-sectional view of the flowmeter of FIG. 16 taken along C-C at 67.5 for the right piston in one embodiment of the present application.
Detailed Description
The embodiment of the application provides a fold and roll type pair two-dimensional piston dynamic flowmeter, has solved among the prior art technical problem that there is hysteresis quality in volumetric flowmeter dynamic flow reading.
In order to solve the technical problems, the general idea of the embodiment of the application is as follows: in the embodiment of the application, the left end of the left piston 5 is connected with a left speed sensor assembly 1 for detecting the axial speed of the left piston 5, and the right end of the right piston 17 is connected with a right speed sensor assembly 18 for detecting the axial speed of the right piston 17; the left speed sensor assembly 1 and the right speed sensor assembly 18 are respectively connected with a central processing unit, the central processing unit receives a left speed signal sent by the left speed sensor assembly 1 and a right speed signal sent by the right speed sensor assembly 18, and calculates flow (Q ═ V) according to the left speed signal and the right speed signal1|+|V2I) A, wherein: q is the flow, V1Is a left velocity signal, V2Is a right speed signal, A is the effective area of the piston), a speed sensor is adopted, the superposed speed signal is in direct proportion to the measured flow signal, the linearity is high, the response frequency is high, the technical problem of hysteresis in the dynamic flow reading of the positive displacement flowmeter in the prior art is solved, and the beneficial effect of real-time reading of the dynamic flow is realized.
In addition, the embodiment of the application adopts a rolling-stacking type transmission device to connect the left metering unit and the right metering unit, so that the left piston 5 of the left metering unit and the right piston 17 of the right metering unit can synchronously rotate and relatively independently axially move; the axial fixation of the overlapping-rolling type transmission device is realized through high-pressure oil static pressure support, so that the conical roller is always attached to the curved surface of the guide rail, no gap is generated, the flow measurement precision can be improved, the overlapping-rolling type transmission device has self-adaptive capacity, the overlapping roller is more firmly fixed along with the rise of the pressure of liquid to be measured, and the flow measurement of the high-pressure liquid can be realized; the radial fixation of the roller is realized by the compression between the rollers, the use of a rolling bearing is cancelled, and the vibration caused by the bearing clearance when the rotating speed is increased is avoided.
In addition, 4 highest points T1 and 4 lowest points T2 are alternately arranged on the outer guide rail 9 and the inner guide rail 10 in the embodiment of the present application, and by adopting an inner guide rail structure and an outer guide rail structure of four wave crests and four wave troughs, the left piston 5 and the right piston 17 rotate circumferentially for one circle to perform four times of axial reciprocating motions, that is, eight times of oil suction and discharge are realized, the cross-sectional area of the pistons can be reduced under the condition of the same displacement, and the response speed of the flowmeter is improved.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
Referring to fig. 1 to 20b, the embodiment provides a stacked and rolled duplex two-dimensional piston dynamic flowmeter, where the flowmeter includes a left casing 2 and a right casing 16, the left casing 2 and the right casing 16 are hermetically communicated through a connecting casing 8, and central axes of the left casing 2, the connecting casing 8 and the right casing 16 are overlapped; a liquid inlet A is arranged on the left shell 2, and a liquid outlet K is arranged on the right shell 16; it is defined that the end where the left shell 2 is located is the left end, the end where the right shell 16 is located is the right end, the axial direction is the direction of the central axis or the direction parallel to the central axis, the axial symmetry is the symmetry with the central axis, the radial direction is the direction of the diameter of the cross section of the connecting shell 8 (the left shell 2 or the right shell 16), and the circumferential direction is the direction around the central axis.
Be equipped with left metering unit in the casing 2 of a left side, left side casing 2 passes through left side metering unit feed liquor and flowing back are equipped with right metering unit in the casing 16 of the right side, right side casing 16 passes through right side metering unit feed liquor and flowing back, and left side casing 2 passes through left metering unit, right casing 16 and passes through right metering unit feed liquor and flowing back in turn.
The left metering unit comprises a left cylinder 4 coaxially arranged in the left shell 2, and the right metering unit comprises a right cylinder 14 coaxially arranged in the right shell 16; the left piston 5 is coaxially arranged in the left cylinder body 4, the right piston 17 is coaxially arranged in the right cylinder body 14, the left piston 5 is connected with the right piston 17 through a rolling type transmission device which allows the left piston 5 and the right piston 17 to synchronously rotate and relatively and independently axially move, and the rolling type transmission device is arranged in an inner cavity of the connecting shell 8.
The left end and the right end of the left piston 5 are respectively connected with a concentric ring 3, a first shoulder is arranged in the middle of the left piston 5, and the first shoulder and the concentric ring 3 separate an inner cavity of the left cylinder body 4 into a closed first left chamber C and a closed first right chamber E; four first left axial grooves a and four first right axial grooves b are circumferentially and equally spaced on the first shoulder, and the first left axial grooves a and the first right axial grooves b are alternately arranged at equal intervals on the circumference of the cross section of the left piston 5, wherein: the first left axial groove a communicates with the first left chamber C and the first right axial groove b communicates with the first right chamber E.
The left end and the right end of the right piston 17 are respectively connected with another pair of the concentric rings, a second shoulder is arranged in the middle of the right piston 17, and the inner cavity of the right cylinder 14 is divided into a closed second left chamber H and a closed second right chamber J by the second shoulder and the concentric rings on the right piston 17; four second left axial grooves d and four second right axial grooves c are circumferentially and equally spaced on the second shoulder, and the second left axial grooves d and the second right axial grooves c are alternately arranged on the circumference of the cross section of the right piston 17 at equal intervals, wherein: the second left axial groove d communicates with a second left chamber H, and the second right axial groove c communicates with a second right chamber J.
The stacking and rolling type transmission device is arranged in the connecting shell 8 and comprises a connecting assembly, a cone roller assembly and a guide rail assembly, and two ends of the connecting assembly are respectively connected with the left piston 5 and the right piston 17; the both ends of coupling assembling are equipped with respectively the guide rail subassembly, awl roller assembly sets up coupling assembling's centre, just awl roller 1101 of awl roller assembly with the rolling surface of guide rail subassembly cooperatees.
The connecting assembly comprises an outer shaft 7 connected with the left piston 5 and an inner shaft 13 connected with the right piston 17, the outer shaft 7 and the inner shaft 13 are arranged on a cross shaft 23 in an axially sliding mode, and the projection of the cross shaft 23 in the direction of the central shaft is in a cross shape.
Outer axle 7 includes the outer axle body, the right side of the outer axle body is equipped with two first armshafts that form the axisymmetric of fork mouth, the left end of first armshaft is equipped with the edge radially extended first thread slipping 702, the right-hand member of first armshaft is equipped with the edge radially extended second thread slipping 704, the left end of the outer axle body is equipped with the connection the first hasp 701 of left piston.
The inner shaft 13 includes an inner shaft body, two axisymmetric second shaft arms forming a fork opening are arranged on the left side of the inner shaft body, a third sliding buckle 1302 extending along the radial direction is arranged at the right end of each second shaft arm, a fourth sliding buckle 1303 extending along the radial direction is arranged at the right end of each second shaft arm, and a second lock catch 1304 connected with the right piston is arranged at the right end of the inner shaft body.
The outer shaft 7 and the inner shaft 13 are crossed with each other and are provided on the cross 23, and the first shaft arm and the second shaft arm are movable in the center axis direction and rotatable in the circumferential direction on the cross 23.
The cone roller assembly comprises a roller stacking shell 12 sleeved on the first shaft arm and the second shaft arm, a first concave annular groove 803 is formed in the connecting shell 8, a second concave annular groove 1203 is formed in the middle of the roller stacking shell 12, and the first annular groove 803 and the second concave annular groove 1203 are buckled to form a high-pressure cavity F; four left tapered holes 1202 inclined to the right are formed in the left end of the stacking roller shell 12 at equal intervals in the circumferential direction, four right tapered holes 1205 inclined to the left are formed in the right end of the stacking roller shell 12 at equal intervals in the circumferential direction, and the left tapered holes 1202 and the right tapered holes 1205 are alternately arranged; the included angle between the central axis of the left conical hole 1202 and the central axis is equal to the included angle between the central axis of the right conical hole 1205 and the central axis, and conical rollers 1101 are rotatably arranged in the left conical hole 1202 and the right conical hole 1205.
Specifically, a pair of adjacent left conical holes 1202 and right conical holes 1205 are staggered by 45 degrees in the circumferential direction, and the axial lines of the left conical holes and the right conical holes are inclined at a certain angle relative to the radial section of the stacking roller shell 12, and the inclination angles are opposite; eight conical rollers 1101 are in contact with each other in pairs and are arranged in a staggered manner, and are mutually compressed to form a roller folding ring, and when the roller folding ring works, the roller folding ring is pressed by high-pressure oil on the outer side and is tightly attached to the inner guide rail 10 and the outer guide rail 9, so that the effect of supporting the inner guide rail 10 and the outer guide rail 9 is achieved.
The guide rail subassembly includes outer guide rail 9 and interior guide rail 10, outer guide rail 9 with the rolling surface of interior guide rail 10 all is axial cyclic annular curved surface, the curved surface has axial undulation, outer guide rail 9 with interior guide rail 10 is in the projection of center pin direction is the ring form, just the curved surface equidistant 4 peak T1 and 4 minimum T2 of being equipped with in turn, peak T1 and minimum T2 be located respectively four diameters of ring on, the curved surface follow respectively four diameter symmetries.
The outer guide rails 9 are fixedly arranged at two ends of the outer shaft 7, the inner guide rails 10 are fixedly arranged at two ends of the inner shaft 13, the inner diameter of the outer guide rails 9 is slightly larger than the outer diameter of the inner guide rails 10, the inner ring sides of the outer guide rails 9 and the inner guide rails 10 are higher than the outer ring sides, and the conical surfaces of the conical rollers are matched with the rolling surfaces of the outer guide rails 9 and the rolling surfaces of the inner guide rails 10; the cone rollers 1101 roll on the corresponding rolling surfaces and push the left piston 5 and the right piston 17 to move axially.
Specifically, the two outer guide rails 9 are arranged in a mirror image manner, and the two inner guide rails 10 are also arranged in a mirror image manner. The second curved guide rail surface 1004 of the inner guide rail 10 and the first curved guide rail surface 901 of the outer guide rail 9 which are positioned at the same end are staggered by 22.5 degrees along the circumferential direction, namely the highest point 1001 of the second curved guide rail surface 1004 corresponds to the middle point of the highest point 902 and the lowest point 903 on the first curved guide rail surface 901 in the circumferential direction; the first guide rail curved surfaces 901 of the two outer guide rails 9 are matched with the eight conical rollers 1101 to move so as to push the outer shaft 7 to move; the second curved rail surfaces 1004 of the two inner rails 10 cooperate with the eight tapered rollers 1101 to push the inner shaft 13 to move.
A left third axial hole 201 is formed in the left shell 2, and a left fourth axial hole 203, a left fifth axial hole 209, a left sixth axial hole 210, a left seventh axial hole 211, a left first radial hole 207 connecting the left third axial hole 201 and the left sixth axial hole 210, and a left second radial hole 208 connecting the left third axial hole 201 and the left fifth axial hole 209 are respectively formed in the shell wall of the left shell 2; a left first annular groove 202 and a left second annular groove 204 are respectively arranged on the inner surface of the left third axial hole 201; the left first annular groove 202 and the outer peripheral surface of the left cylinder body 4 are enclosed to form a left liquid inlet cavity B, and the left second annular groove 204 and the outer peripheral surface of the left cylinder body 4 are enclosed to form a left liquid outlet cavity D.
A right third axial hole 1606 is arranged in the right shell 16, and a right fourth axial hole 1601, a right fifth axial hole 1603, a right sixth axial hole 1611, a right seventh axial hole 1610, a right first radial hole 1605 connecting the right third axial hole 1606 and the right fifth axial hole 1603, a right second radial hole 1602 connecting the right fourth axial hole 1606 and the right third axial hole 1606, and a right third radial hole 1612 connecting the right third axial hole 1606 and the right seventh axial hole 1610 are arranged on the shell wall of the right shell 16; a right first annular groove 1604 and a right second annular groove 1607 are respectively arranged on the inner surface of the right third axial hole 1606; the right first annular groove 1604 and the outer peripheral surface of the right cylinder 14 enclose to form a right liquid inlet chamber G, and the right second annular groove 1607 and the outer peripheral surface of the right cylinder 14 enclose to form a right liquid outlet chamber I.
A middle axial through hole 802 is arranged in the connecting shell 8, and a first axial connecting hole 801 communicating the left fourth axial hole 203 with the right fourth axial hole 1601, a second axial connecting hole 805 communicating the left fifth axial hole 209 with the right fifth axial hole 1603, a third axial connecting hole 806 connecting the left seventh axial hole 211, a fourth axial connecting hole 809 connecting the right seventh axial hole 1610, a first radial connecting hole 804 connecting the middle axial through hole 802 with the third axial connecting hole 806, and a second radial connecting hole 807 connecting the middle axial through hole 802 with the fourth axial connecting hole 808 are arranged on the shell wall of the connecting shell 8; the surface of the intermediate axial through hole 802 is provided with an intermediate first annular groove 803.
The left cylinder body 4 is provided with four left liquid inlet windows 403 which are communicated with the first left axial groove a or the first right axial groove b, the left cylinder body 4 is further provided with four left liquid outlet windows 404 which are communicated with the first left axial groove a or the first right axial groove b, and the left liquid inlet windows 403 and the left liquid outlet windows 404 are alternately distributed on the circumference of the left cylinder body 4 at equal intervals.
Four right liquid inlet windows 1402 communicated with the second left axial groove d or the second right axial groove c are formed in the right cylinder 14, four right liquid outlet windows 1403 communicated with the second left axial groove d or the second right axial groove c are further formed in the right cylinder 4, and the right liquid inlet windows 1402 and the right liquid outlet windows 1403 are alternately distributed on the circumference of the right cylinder 14 at equal intervals.
The liquid inlet A, the left liquid inlet cavity B and the left liquid inlet window 403 are sequentially connected to form a liquid inlet channel of the left metering unit; the left liquid outlet window 404, the left liquid outlet cavity D, the left second radial hole 208, the left fifth axial hole 209, the second axial connecting hole 805, the right fifth axial hole 1603, the right first radial hole 1605, the right liquid outlet cavity I and the liquid outlet K are sequentially connected to form a liquid outlet channel of the left metering unit.
The liquid inlet A, the left fourth axial hole 203, the first axial connecting hole 801, the right fourth axial hole 1601, the right second radial hole 1602, the right liquid inlet cavity G and the right liquid inlet window 1402 are sequentially connected to form a liquid inlet channel of the right metering unit; the right liquid outlet window 1403, the right liquid outlet cavity I and the liquid outlet K form a liquid outlet channel of the right metering unit.
High-pressure oil is filled in a high-pressure cavity F on the outer side of the laminated roller shell 12 during working; the liquid inlet A, the left liquid inlet cavity B, the left first radial hole 207, the left sixth axial hole 210, the left seventh axial hole 211, the third axial connecting hole 806 and the first radial connecting hole 804 are sequentially connected to form a first high-pressure channel.
The liquid outlet K, the right liquid outlet cavity I, the right sixth axial hole 1611, the right seventh axial hole 1610, the right second axial hole 1609, the fourth axial connecting hole 808 and the second radial connecting hole 807 are sequentially connected to form a second high-pressure channel.
A check valve 15 is arranged in the left seventh axial hole 211, and the opening of the working end P1 faces the left sixth axial hole 210; the right second axial hole 1609 is provided with another one-way valve 15, and the working end P1 is ported toward the right seventh axial hole 1610.
The wave shapes of the curved surface fluctuation of the outer guide rails 9 positioned at the two ends of the outer shaft 7 are mutually in phase and are symmetrical about the central cross section of the roller stacking shell 12; the wave shapes of the curved surface fluctuation of the inner guide rails 10 positioned at the two ends of the inner shaft are mutually in phase and are symmetrical about the central cross section of the roller stacking shell 12; the outer guide rail 9 and the inner guide rail 10 at the same end are circumferentially offset by 22.5 °, namely: the phase phases of the curved surface waveforms on the outer guide rail 9 and the inner guide rail 10 at the left end are 22.5 degrees, and the phase phases of the curved surface waveforms on the outer guide rail 9 and the inner guide rail 10 at the right end are 22.5 degrees.
The left piston 5 is connected with a left speed sensor assembly 1 for detecting the axial speed of the left piston 5, and the right piston 17 is connected with a right speed sensor assembly 18 for detecting the axial speed of the right piston 17; the left speed sensor assembly 1 and the right speed sensor assembly 18 are respectively connected with a central processing unit, the central processing unit receives a left speed signal sent by the left speed sensor assembly 1 and a right speed signal sent by the right speed sensor assembly 18, and flow is calculated according to the left speed signal and the right speed signal.
In this embodiment, the curved surface is alternately provided with four highest points T1 and four lowest points T2. When the left piston 5 or the right piston 17 rotates along the circumferential direction, the outer guide rail 9 and the inner guide rail 10 synchronously rotate, so that the contact points of the outer guide rail 9 and the inner guide rail 10 and the corresponding cone roller 1101 change, and if the contact points of the cone roller 1101 and the outer guide rail 9 and the inner guide rail 10 move from the lowest point T2 to the adjacent highest point T1, the acting force of the cone roller 1101 on the outer guide rail 9 and the inner guide rail 10 synchronously forces the left piston 5 or the right piston 17 to axially move; if the contact point between the outer rail 9 and the inner rail 10 and the corresponding cone roller 1101 moves from the highest point T1 to the adjacent lowest point T2, the force of the cone roller 1101 on the outer rail 9 and the inner rail 10 will simultaneously force the left piston 5 or the right piston 17 to move axially. When the left piston 5 or the right piston 17 is driven by hydraulic pressure to move axially, the outer guide rail 9 and the inner guide rail 10 extrude the conical roller 1101, and the acting force of the outer guide rail 9 and the inner guide rail 10 on the conical roller 1101 can generate a reaction force of the conical roller 1101 on the outer guide rail 9 and the inner guide rail 10, so that the outer guide rail 9 and the inner guide rail 10 are forced to rotate circumferentially, and the left piston 5 or the right piston 17 is driven to rotate circumferentially.
In the present embodiment, the undulation of the curved surface of the outer guide rails 9 at both ends of the outer shaft 7 are in phase with each other and symmetrical with respect to the central cross section of the roller housing 12; the wave shapes of the curved surface fluctuation of the inner guide rails 10 positioned at the two ends of the inner shaft are mutually in phase and are symmetrical about the central cross section of the roller stacking shell 12; the outer guide rail 9 and the inner guide rail 10 which are positioned at the same end are arranged in a staggered manner of 22.5 degrees along the circumferential direction, so that the left piston 5 or the right piston 17 is promoted to axially move towards the same direction.
In the present embodiment, the areas between the adjacent lowest point T2 and highest point T1 on the outer rail 9 and the inner rail 10 form a movement interval, the central angle corresponding to each movement interval is 45 °, and in each movement interval, the left piston 5 or the right piston 17 performs one axial movement in one direction. And because the shape of the inner curved surface of each motion interval is the same, the waveforms of the curved surfaces of the adjacent motion intervals are in opposite phases, so that the left piston 5 or the right piston 17 moves leftwards and rightwards with the same speed curve.
In the present embodiment, the middle of the highest point T1 and the lowest point T2 in each motion interval on the outer rail 9 and the inner rail 10 has a middle point, and the corresponding central angle between the highest point T1 and the middle point is 22.5 °, and the corresponding central angle between the lowest point T2 and the middle point is 22.5 °.
In the present embodiment, the shapes of the outer guide rail 9 and the inner guide rail 10 enable the left piston 5 or the right piston 17 to satisfy the deceleration motion law such as equal acceleration, that is, in each motion interval, in the first half of the interval, the left piston 5 or the right piston 17 accelerates with the same acceleration, and in the second half of the interval, the left piston 5 or the right piston 17 decelerates with the same deceleration, so that the left piston 5 or the right piston 17 moves leftwards and rightwards with the same acceleration curve, and the motion of the left piston 5 or the right piston 17 is definitely controllable.
In this embodiment, the tapered surface of the tapered roller 1101 is in contact with the curved surfaces of the outer rail 9 and the inner rail 10, and prevents slippage during rotation.
In the present embodiment, the volumes of the first left chamber C and the first right chamber E change during the axial movement of the left piston 5, and the volumes of the second left chamber H and the second right chamber J change during the axial movement of the right piston 17. When the left piston 5 is located at the middle of its axial stroke, the volumes of the first left chamber C and the first right chamber E are equal, and when the left piston 5 is located at the leftmost end of its axial stroke, the volume of the first left chamber C is at the minimum (i.e., the minimum volume of the first left chamber C), and the volume of the first right chamber E is at the maximum (i.e., the maximum volume of the first right chamber E); when the left piston 5 is at the rightmost end of its axial stroke, the volume of the first left chamber C is at a maximum (i.e. the maximum volume of the first left chamber C), and the volume of the first right chamber E is at a minimum (i.e. the minimum volume of the first right chamber E); the same applies to the change in the volumes of the second left chamber H and the second right chamber J during the axial movement of the right piston 17.
Referring to fig. 1, the zero state of the present invention is defined as: at the leftmost end of the axial stroke of the left piston 5 in the left cylinder 4, the flow channels (the first left axial groove a and the first right axial groove b) in the left piston 5 are not communicated with all windows (the left liquid inlet window 403 and the left liquid outlet window 404) of the left cylinder 4, because the left piston 5 and the right piston 17 are circumferentially staggered by 22.5 degrees, at the moment, the right piston 17 is in the middle of the axial stroke, and the communication areas between the flow channels (the second left axial groove d and the second right axial groove c) in the right piston 17 and all windows (the right liquid inlet window 1402 and the right liquid outlet window 1403) of the right cylinder 14 are the largest;
the left piston rotates for a circle for 360 degrees along the circumferential direction, under the condition of defining a zero position, the left piston 5 (the right piston 17 can also be used as a reference standard) of the invention is positioned at a 0-degree position, and high-pressure liquid enters a liquid inlet A of the left shell 2 and exits from a liquid outlet K of the right shell;
the positions of the first left axial groove a, the first right axial groove b, the second left axial groove d and the second right axial groove c, the left liquid inlet window 403, the left liquid outlet window 404, the right liquid inlet window 1402 and the right liquid outlet window 1403 have the following corresponding relations:
in the first state (when the left piston 5 is at 0 ° or 90 ° or 180 ° or 270 °):
in the right cylinder body 14, the liquid drives the right piston 17 to move rightwards, and the right piston 17 is forced to rotate downwards along the circumferential direction by the movement of the inner guide rail 10 and the overlapping and rolling type transmission device; the second left axial slot d is aligned with the right liquid inlet window 1402, and the second right axial slot c is aligned with the right liquid outlet window 1403; the second left chamber H sequentially passes through a liquid inlet channel of the right metering unit and the second left axial groove d to feed liquid, and the second right chamber J sequentially passes through the second right axial groove c and a liquid discharge channel of the right metering unit to discharge liquid;
in the left cylinder body 4, the left piston 5 is driven by the right piston 17 to rotate along the circumferential direction and is forced to move along the axial direction to move rightwards under the action of the outer guide rail 9 and the overlapped rolling type transmission device; the first left axial groove a is not communicated with the left liquid inlet window 403 or the left liquid outlet window 404, the first right axial groove b is not communicated with the left liquid inlet window 403 or the left liquid outlet window 404, the first left chamber C is not filled with liquid or drained of liquid, and the first right chamber E is not filled with liquid or drained of liquid;
in the second state (when the left piston 5 is at 22.5 ° or 112.5 ° or 202.5 ° or 292.5 °):
in the left cylinder body 4, the liquid drives the left piston 5 to move rightwards, and the left piston 5 is forced to rotate along the circumferential direction by the movement of the outer guide rail 9 and the overlapping and rolling type transmission device; the first left axial groove a is aligned with the left liquid inlet window 403, and the first right axial groove b is aligned with the left liquid outlet window 404; the first left chamber C is sequentially fed with liquid through a liquid inlet channel of the left metering unit and the first left axial groove a, and the first right chamber E is sequentially discharged with liquid through the first right axial groove b and a liquid discharge channel of the left metering unit;
in the right cylinder body 14, a right piston 17 is driven by the left piston 5 to rotate along the circumferential direction and is forced to move along the axial direction to the left by the movement of the inner guide rail 10 and the overlapping and rolling type transmission device; the second left axial groove d is not communicated with the right liquid inlet window 1402 or the right liquid outlet window 1403, and the second right axial groove c is not communicated with the right liquid inlet window 1402 or the right liquid outlet window 1403; the second left chamber H neither feeds nor discharges liquid, and the second right chamber J neither feeds nor discharges liquid;
in the third state (when the left piston 5 is at 45 ° or 135 ° or 225 ° or 315 °):
in the right cylinder body 14, the liquid drives the right piston 17 to move leftwards, and the right piston is forced to rotate along the circumferential direction by the movement of the inner guide rail 10 and the overlapping and rolling type transmission device; the second right axial slot c is aligned with the right liquid inlet window 1402, and the second left axial slot d is aligned with the right liquid outlet window 1403; the second right chamber J sequentially passes through a liquid inlet channel of the right metering unit and the second right axial groove c to feed liquid; the second left chamber H discharges liquid through a second left axial groove d and a liquid discharge channel of the right metering unit in sequence;
in the left cylinder body 4, the left piston 5 is driven by the right piston 17 to rotate in the circumferential direction and moves leftwards along the axial direction under the action of the outer guide rail 9 and the movement of the overlapping and rolling type transmission device; the first left axial groove a is not communicated with the left liquid inlet window 403 or the left liquid outlet window 404, the first right axial groove b is not communicated with the left liquid inlet window 403 or the left liquid outlet window 404, the first left chamber C is not filled with liquid or drained of liquid, and the first right chamber E is not filled with liquid or drained of liquid;
fourth state (when the left piston 5 is at 67.5 ° or 157.5 ° or 247.5 ° or 337.5 °):
in the left cylinder body 4, the liquid drives the left piston 5 to move leftwards, and the left piston 5 is forced to rotate along the circumferential direction by the movement of the outer guide rail 9 and the overlapping and rolling type transmission device; the first left axial groove a is aligned with the left liquid outlet window 404, and the first right axial groove b is aligned with the left liquid inlet window 403; the first right chamber E sequentially enters liquid through a liquid inlet channel of the left metering unit and the first right axial groove b, and the first left chamber C sequentially discharges liquid through the first left axial groove a and a liquid discharge channel of the left metering unit;
in the right cylinder body 14, the right piston and the right cylinder body 14, the right piston 17 is driven by the left piston 5 to rotate along the circumferential direction and is forced to move along the axial direction to move rightwards by the movement of the inner guide rail 10 and the overlapping and rolling type transmission device; the second left axial groove d is not communicated with the right liquid inlet window 1402 or the right liquid outlet window 1403, and the second right axial groove c is not communicated with the right liquid inlet window 1402 or the right liquid outlet window 1403; the second left chamber H neither feeds nor drains liquid, and the second right chamber J neither feeds nor drains liquid.
According to the embodiment of the application, the left end of the left piston 5 is connected with the left speed sensor for detecting the axial speed of the left piston 5A sensor assembly 1, wherein a right speed sensor assembly 18 for detecting the axial speed of the right piston 17 is connected to the right end of the right piston 17; the left speed sensor assembly 1 and the right speed sensor assembly 18 are respectively connected with a central processing unit, the central processing unit receives a left speed signal sent by the left speed sensor assembly 1 and a right speed signal sent by the right speed sensor assembly 18, and calculates flow (Q ═ V) according to the left speed signal and the right speed signal1|+|V2I) A, wherein: q is the flow, V1Is a left velocity signal, V2Is a right speed signal, A is the effective area of the piston), a speed sensor is adopted, the superposed speed signal is in direct proportion to the measured flow signal, the linearity is high, the response frequency is high, the technical problem of hysteresis in the dynamic flow reading of the positive displacement flowmeter in the prior art is solved, and the beneficial effect of real-time reading of the dynamic flow is realized.
In addition, the embodiment of the application adopts a rolling-stacking type transmission device to connect the left metering unit and the right metering unit, so that the left piston 5 of the left metering unit and the right piston 17 of the right metering unit can synchronously rotate and relatively independently axially move; the axial fixation of the overlapping-rolling type transmission device is realized through high-pressure oil static pressure support, so that the conical roller is always attached to the curved surface of the guide rail, no gap is generated, the flow measurement precision can be improved, the overlapping-rolling type transmission device has self-adaptive capacity, the overlapping roller is more firmly fixed along with the rise of the pressure of liquid to be measured, and the flow measurement of the high-pressure liquid can be realized; the radial fixation of the roller is realized by the compression between the rollers, the use of a rolling bearing is cancelled, and the vibration caused by the bearing clearance when the rotating speed is increased is avoided.
In addition, 4 highest points T1 and 4 lowest points T2 are alternately arranged on the outer guide rail 9 and the inner guide rail 10 in the embodiment of the present application, and by adopting an inner guide rail structure and an outer guide rail structure of four wave crests and four wave troughs, the left piston 5 and the right piston 17 rotate circumferentially for one circle to perform four times of axial reciprocating motions, that is, eight times of oil suction and discharge are realized, the cross-sectional area of the pistons can be reduced under the condition of the same displacement, and the response speed of the flowmeter is improved.
In this application embodiment, be equipped with on the center pin of concentric ring 3 and supply left piston 5 or right piston 17 insert and the concentric ring hole that removes, be equipped with constant head tank 302 on the periphery of concentric ring 3, the interval is equipped with four left radial positioning through-holes 402 on the internal face of left side cylinder body 4, the interval is equipped with four right radial positioning through-holes 1404 on the internal face of right side cylinder body 14, left side radial positioning through-holes 402 right radial positioning through-holes 1404 respectively with correspond constant head tank 302 on the concentric ring 3 passes through locating pin 6 fixed connection, thereby realizes concentric ring 3 is in left side cylinder body 4 or axial positioning on the right cylinder body 14.
The concentric ring inner holes 301 of the concentric ring 3 can ensure that the piston rod of the left piston 5 or the right piston 17 can move freely in the concentric ring and achieve the effect of gap sealing.
In an embodiment of the present application, the left liquid inlet window 403 and the left liquid outlet window 404 are both rectangular inclined holes, and the adjacent left liquid inlet window 403 and the adjacent left liquid outlet window 404 are circumferentially spaced by 45 ° and axially and respectively diverge left and right to form an included angle of 90 °; the right liquid inlet window 1402 and the right liquid outlet window 1403 are rectangular inclined holes, and the right liquid inlet window 1402 and the right liquid outlet window 1403 are adjacent to each other at intervals of 45 degrees in the circumferential direction and are respectively forked at 90-degree included angles in the left and right directions along the axial direction.
In an embodiment of the present application, the left cylinder 4 is in interference fit with the left third axial hole 201 of the left housing 2, and the left piston 5 is in clearance fit with the left cylinder inner hole 401 of the left cylinder 4; the right cylinder 14 is in interference fit with a right housing inner hole 1605 of the right housing 16, and the right piston 17 is in clearance fit with a right cylinder inner hole 1401 of the right cylinder.
In an embodiment of the present application, the first shoulder is provided with two first left radial communication holes 501 for respectively communicating two axisymmetric first left axial grooves a, and the first shoulder is further provided with two first right radial communication holes 502 for respectively communicating two axisymmetric first right axial grooves b; the second shoulder is provided with two second left radial communication holes 1701 for respectively communicating the two axisymmetric second left axial grooves d, and the second shoulder is further provided with two second right radial communication holes 1702 for respectively communicating the two axisymmetric second right axial grooves c.
In an embodiment of the present application, the cross shaft 23 includes four plate bodies that are vertically intersected to form the cross shape, two sides of each plate body are recessed to form elongated slots 2301, and ball strips are disposed in the eight elongated slots 2301; the inboard of first shaft arm is equipped with the edge first V type slide 703 that the center pin direction extends, the inboard of second shaft arm is equipped with the edge second V type slide 1301 that the center pin direction extends, be equipped with the ball on the ball strip, the ball rotationally pastes and establishes corresponding first V type slide 703 or on second V type slide 1301 to reduce frictional force.
In an embodiment of the present application, a left flat groove 503 is formed at a left end of the left piston 5, and the first lock 701 is fastened to the left flat groove 503; the left end of the right piston 17 is provided with a right flat slot 1703, and the second lock 1304 is buckled on the right flat slot 1703.
In an embodiment of the present application, the tapered roller 1101 has a tapered surface 1101a, the tapered roller 1101 has a tapered roller cavity 1101b therein, one end of the tapered roller shaft 1102 is fixedly inserted into the tapered roller cavity 1101b, the other end of the tapered roller shaft is rotatably inserted through the left tapered hole 1202 or the right tapered hole 1205 of the stack roller housing 12 and is connected with a roller sleeve 1103 that prevents slipping, the roller sleeve 1103 is buckled on the step surface 1204 of the left tapered hole 1202 or the right tapered hole 1205, and the tapered roller 1101 is supported on the tapered holes 1202 and 1205 and maintains a spatial posture to be in contact with the rolling surfaces of the inner rail 10 and the outer rail 9.
In an embodiment of the present application, the inner ring wall surface of the outer guide rails 9 is provided with first sliding-fastener grooves 904, and the first sliding-fastener grooves 904 of the two outer guide rails 9 are respectively engaged with the first sliding fastener 702 and the second sliding fastener 704 on the outer shaft 7; the inner wall of the inner guide rail 10 is provided with a second sliding buckle groove 1002 on the annular surface, and the second sliding buckle grooves 1002 on the two inner guide rails 13 are respectively embedded with a third sliding buckle 1302 and a fourth sliding buckle 1303 on the inner shaft 13.
In an embodiment of the present application, a left first axial hole 205 and a left second axial hole 206 are provided on a left end surface of the left housing 2; a right first axial hole 1608 and a right second axial hole 1609 are provided on the right end surface of the right housing 16.
The left sensor component 1 comprises a left knob 19, a left coil framework 20, a left isolation sleeve 21 and a left permanent magnet 22; wherein: the left knob 19 is fixedly connected with the left shell 2 through threads, the left coil framework 20 is tightly pressed in the left first axial hole 205 through the left knob 19, the left permanent magnet 22 is axially movably sleeved in the left isolation sleeve 21, and the right end of the left permanent magnet 22 penetrates through the left second axial hole 206 and is fixedly connected with the left end face of the left piston 5 through a bolt, so that the left permanent magnet 22 and the left piston 5 keep synchronous motion.
The structure of the right sensor assembly 18 is the same as that of the left sensor assembly 1, and the right sensor assembly 18 and the left sensor assembly 1 are symmetrically arranged about a cross section in the middle of the connecting cylinder 8. The right sensor assembly 18 comprises a right knob, a right coil framework, a right isolation sleeve and a right permanent magnet; wherein: the right knob is fixedly connected with the right shell through threads, the right coil framework is pressed in the right first axial hole 1608 through the right knob, the right permanent magnet is sleeved in the right isolation sleeve in an axially movable mode, the right end of the right permanent magnet penetrates through the right second axial hole 1609 and is fixedly connected with the right end face of the right piston 17 through a bolt, and the right permanent magnet and the right piston 17 are enabled to keep synchronous motion.
It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element may be termed a second element, and, similarly, a second element may be termed a first element, without departing from the scope of example embodiments.
The terms of orientation, outer, intermediate, inner, etc., as referred to or as may be referred to in the specification are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed according to the position and the use state of the structure. Therefore, these and other directional terms should not be construed as limiting terms.
While the foregoing is directed to the preferred embodiment of the present application, and not to the limiting thereof in any way and any way, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. Those skilled in the art can make various changes, modifications and equivalent arrangements to those skilled in the art without departing from the spirit and scope of the present application; moreover, any equivalent alterations, modifications and variations of the above-described embodiments according to the spirit and techniques of this application are intended to be within the scope of the claims of this application.

Claims (10)

1. The utility model provides a roll type pair two dimension piston dynamic flowmeter which characterized in that: the flowmeter comprises a left shell (2), a connecting shell (8) and a right shell (16) which are coincident with each other in a central axis, wherein the left shell (2) and the right shell (16) are hermetically communicated through the connecting shell (8), a liquid inlet is formed in the left shell (2), and a liquid outlet is formed in the right shell (16); defining one end where the left shell (2) is located as a left end, one end where the right shell (16) is located as a right end, the axial direction is the direction of the central shaft or the direction parallel to the central shaft, the axial symmetry refers to the symmetry with the central shaft, the radial direction refers to the direction where the diameter of the cross section of the connecting shell (8) is located, and the circumferential direction is the direction around the central shaft;
a left metering unit is arranged in the left shell (2), a right metering unit is arranged in the right shell (16), the left shell (2) is used for feeding liquid and discharging liquid through the left metering unit, and the right shell (16) is used for feeding liquid and discharging liquid through the right metering unit;
the left metering unit comprises a left cylinder body (4) coaxially arranged in the left shell (2), and the right metering unit comprises a right cylinder body (14) coaxially arranged in the right shell (16); a left piston (5) is coaxially arranged in the left cylinder body (4), a right piston (17) is coaxially arranged in the right cylinder body (14), the left piston (5) is connected with the right piston (17) through a rolling type transmission device which allows the left piston (5) and the right piston (17) to synchronously rotate and relatively independently axially move, and the rolling type transmission device is arranged in an inner cavity of the connecting shell (8);
the left end and the right end of the left piston (5) are respectively connected with a concentric ring (3), a first shoulder is arranged in the middle of the left piston (5), and the first shoulder and the concentric ring (3) separate an inner cavity of the left cylinder body (4) into a closed first left chamber (C) and a closed first right chamber (E); four first left axial grooves (a) and four first right axial grooves (b) are arranged on the first shoulder at equal intervals along the circumferential direction, and the first left axial grooves (a) and the first right axial grooves (b) are alternately arranged at equal intervals on the circumference of the cross section of the left piston (5), wherein: said first left axial groove (a) communicating with said first left chamber (C), said first right axial groove (b) communicating with said first right chamber (E);
the left end and the right end of the right piston (17) are respectively connected with another pair of concentric rings, a second shoulder is arranged in the middle of the right piston (17), and the inner cavity of the right cylinder body (14) is divided into a closed second left chamber (H) and a closed second right chamber (J) by the second shoulder and the concentric rings on the right piston (17); four second left axial grooves (d) and four second right axial grooves (c) are arranged on the second shoulder at equal intervals along the circumferential direction, and the second left axial grooves (d) and the second right axial grooves (c) are alternately arranged at equal intervals on the circumference of the cross section of the right piston (17), wherein: the second left axial groove (d) communicates with a second left chamber (H), the second right axial groove (c) communicates with the second right chamber (J);
the left piston (5) is connected with a left speed sensor assembly (1) for detecting the axial speed of the left piston (5), and the right piston (17) is connected with a right speed sensor assembly (18) for detecting the axial speed of the right piston (17); the left speed sensor assembly (1) and the right speed sensor assembly (18) are respectively connected with a central processing unit, the central processing unit receives a left speed signal sent by the left speed sensor assembly (1) and a right speed signal sent by the right speed sensor assembly (18), and flow is calculated according to the left speed signal and the right speed signal;
the stacking and rolling type transmission device is arranged in the connecting shell (8) and comprises a connecting assembly, a cone roller assembly and a guide rail assembly, and two ends of the connecting assembly are respectively connected with the left piston (5) and the right piston (17); the two ends of the connecting assembly are respectively provided with the guide rail assemblies, the cone roller assemblies are arranged in the middle of the connecting assembly, and the outer guide rail 9 and the inner guide rail 10 of each cone roller assembly are matched with the rolling surfaces of the guide rail assemblies;
the connecting assembly comprises an outer shaft (7) connected with the left piston (5) and an inner shaft (13) connected with the right piston (17), the outer shaft (7) and the inner shaft (13) are arranged on a cross shaft (23) in an axially sliding mode, and the projection of the cross shaft (23) in the central shaft direction is in a cross shape;
the outer shaft (7) comprises an outer shaft body, two axisymmetric first shaft arms forming a fork opening are arranged on the right side of the outer shaft body, a first slide fastener (702) extending along the radial direction is arranged at the left end of each first shaft arm, a second slide fastener (704) extending along the radial direction is arranged at the right end of each first shaft arm, and a first lock catch (701) connected with the left piston is arranged at the left end of the outer shaft body;
the inner shaft (13) comprises an inner shaft body, two axisymmetric second shaft arms forming a fork opening are arranged on the left side of the inner shaft body, a third slide fastener (1302) extending along the radial direction is arranged at the right end of each second shaft arm, a fourth slide fastener (1303) extending along the radial direction is arranged at the right end of each second shaft arm, and a second lock catch (1304) connected with the right piston is arranged at the right end of the inner shaft body;
the outer shaft (7) and the inner shaft (13) are crossed and crossed on the cross shaft (23), and the first shaft arm and the second shaft arm can move on the cross shaft (23) along the central shaft direction and can rotate along the circumferential direction;
the cone roller assembly comprises a roller stacking shell (12) sleeved on the first shaft arm and the second shaft arm, a first concave annular groove (803) is formed in the connecting shell (8), a second concave annular groove (1203) is formed in the middle of the roller stacking shell (12), and the first annular groove (803) and the second annular groove (1203) are buckled to form a high-pressure cavity (F); four left tapered holes (1202) which incline to the right are formed in the left end of the roller stacking shell (12) at equal intervals along the circumferential direction, four right tapered holes (1205) which incline to the left are formed in the right end of the roller stacking shell (12) at equal intervals along the circumferential direction, and the left tapered holes (1202) and the right tapered holes (1205) are alternately arranged; an included angle between the central axis of the left conical hole (1202) and the central axis is equal to an included angle between the central axis of the right conical hole (1205) and the central axis, and conical rollers (1101) are rotatably arranged in the left conical hole (1202) and the right conical hole (1205);
the guide rail assembly comprises an outer guide rail (9) and an inner guide rail (10), rolling surfaces of the outer guide rail (9) and the inner guide rail (10) are all axial annular curved surfaces, the curved surfaces have axial fluctuation, projections of the outer guide rail (9) and the inner guide rail (10) in the central axis direction are annular, the curved surfaces are alternately provided with 4 highest points (T1) and 4 lowest points (T2) at equal intervals, the highest points (T1) and the lowest points (T2) are respectively located on four diameters of the annular, and the curved surfaces are respectively symmetrical according to the four diameters;
the outer guide rails (9) are fixedly arranged at two ends of the outer shaft (7), the inner guide rails (10) are fixedly arranged at two ends of the inner shaft (13), the inner diameter of the outer guide rails (9) is slightly larger than the outer diameter of the inner guide rails (10), the inner ring sides of the outer guide rails (9) and the inner guide rails (10) are higher than the outer ring sides, and the conical surfaces of the conical rollers are matched with the rolling surfaces of the outer guide rails (9) and the inner guide rails (10); the conical roller (1101) rolls on the corresponding rolling surface and pushes the left piston (5) and the right piston (17) to move along the axial direction;
a left third axial hole (201) is formed in the left shell (2), and a left fourth axial hole (203), a left fifth axial hole (209), a left sixth axial hole (210), a left seventh axial hole (211), a left first radial hole 207 connecting the left third axial hole (201) with the left sixth axial hole (210), and a left second radial hole (208) connecting the left third axial hole (201) with the left fifth axial hole (209) are respectively formed in the shell wall of the left shell (2); a left first annular groove (202) and a left second annular groove (204) are respectively arranged on the inner surface of the left third axial hole (201); the left first annular groove (202) and the outer peripheral surface of the left cylinder body (4) are enclosed to form a left liquid inlet cavity (B), and the left second annular groove (204) and the outer peripheral surface of the left cylinder body (4) are enclosed to form a left liquid outlet cavity (D);
a right third axial hole (1606) is arranged in the right shell (16), a right fourth axial hole (1601), a right fifth axial hole (1603), a right sixth axial hole (1611), a right seventh axial hole (1610), a right first radial hole (1605) connecting the right third axial hole (1606) and the right fifth axial hole (1603), a right second radial hole (1602) connecting the right fourth axial hole (1601) and the right third axial hole (1606), and a right third radial hole (1612) connecting the right third axial hole (1606) and the right seventh axial hole (1610) are arranged on the shell wall of the right shell (16); a right first annular groove 1604 and a right second annular groove 1607 are respectively arranged on the inner surface of the right third axial hole 1606; the right first annular groove 1604 and the outer peripheral surface of the right cylinder body (14) are enclosed to form a right liquid inlet cavity (G), and the right second annular groove (1607) and the outer peripheral surface of the right cylinder body (14) are enclosed to form a right liquid outlet cavity (I);
a middle axial through hole (802) is arranged in the connecting shell (8), a first axial connecting hole (801) which is communicated with a left fourth axial hole (203) and a right fourth axial hole (1601), a second axial connecting hole (805) which is communicated with a left fifth axial hole (209) and a right fifth axial hole (1603), a third axial connecting hole (806) which is connected with a left seventh axial hole (211), a fourth axial connecting hole 809 which is connected with a right seventh axial hole (1610), a first radial connecting hole (804) which is connected with the middle axial through hole (802) and the third axial connecting hole (806), and a second radial connecting hole (807) which is connected with the middle axial through hole (802) and the fourth axial connecting hole (808) are arranged on the shell wall of the connecting shell (8); the surface of the middle axial through hole (802) is provided with a middle first annular groove (803);
the left cylinder body (4) is provided with four left liquid inlet windows (403) communicated with the first left axial groove (a) or the first right axial groove (b), the left cylinder body (4) is further provided with four left liquid outlet windows (404) communicated with the first left axial groove (a) or the first right axial groove (b), and the left liquid inlet windows (403) and the left liquid outlet windows (404) are alternately distributed on the circumference of the left cylinder body (4) at equal intervals;
the right cylinder body (14) is provided with four right liquid inlet windows (1402) communicated with the second left axial groove (d) or the second right axial groove (c), the right cylinder body (4) is further provided with four right liquid outlet windows (1403) communicated with the second left axial groove (d) or the second right axial groove (c), and the right liquid inlet windows (1402) and the right liquid outlet windows (1403) are alternately distributed on the circumference of the right cylinder body (14) at equal intervals;
the liquid inlet (A), the left liquid inlet cavity (B) and the left liquid inlet window (403) are sequentially connected to form a liquid inlet channel of the left metering unit; the left liquid outlet window (404), the left liquid outlet cavity (D), the left second radial hole (208), the left fifth axial hole (209), the second axial connecting hole (805), the right fifth axial hole (1603), the right first radial hole (1605), the right liquid outlet cavity (I) and the liquid outlet (K) are sequentially connected to form a liquid outlet channel of the left metering unit;
the liquid inlet (A), the left fourth axial hole (203), the first axial connecting hole (801), the right fourth axial hole (1601), the right second radial hole (1602), the right liquid inlet cavity (G) and the right liquid inlet window (1402) are sequentially connected to form a liquid inlet channel of the right metering unit; the right liquid outlet window (1403), the right liquid outlet cavity (I) and the liquid outlet (K) form a liquid outlet channel of the right metering unit;
high-pressure oil is filled in a high-pressure cavity (F) on the outer side of the roller folding shell (12) during working; the liquid inlet (A), the left liquid inlet cavity (B), the left first radial hole 207, the left sixth axial hole (210), the left seventh axial hole (211), the third axial connecting hole (806) and the first radial connecting hole (804) are sequentially connected to form a first high-pressure channel;
the liquid outlet (K), the right liquid outlet cavity (I), the right sixth axial hole (1611), the right seventh axial hole (1610), the right second axial hole (1609), the fourth axial connecting hole 808 and the second radial connecting hole (807) are sequentially connected to form a second high-pressure channel;
the wave shapes of the curved surface fluctuation of the outer guide rails (9) positioned at the two ends of the outer shaft (7) are mutually in phase and are symmetrical about the central cross section of the roller stacking shell (12); the wave shapes of the curved surface fluctuation of the inner guide rails (10) positioned at the two ends of the inner shaft are mutually in phase and are symmetrical about the central cross section of the roller stacking shell (12); the outer guide rail (9) and the inner guide rail (10) which are positioned at the same end are arranged along the circumferential direction by staggering 22.5 degrees, namely: the phase phases of the curved surface waveforms on the outer guide rail (9) and the inner guide rail (10) at the left end are 22.5 degrees, and the phase phases of the curved surface waveforms on the outer guide rail (9) and the inner guide rail (10) at the right end are 22.5 degrees;
first left axial groove (a), first right axial groove (b), second left axial groove (d), second right axial groove (c) and left feed liquor window (403), left play liquid window (404), right feed liquor window (1402), the position of right play liquid window (1403) have as follows corresponding relation:
in a first state:
in the right cylinder body (14), the right piston (17) is driven by liquid to move rightwards, and the right piston (17) is forced to rotate downwards along the circumferential direction by the movement of the inner guide rail (10) and the overlapping and rolling type transmission device; the second left axial groove (d) is aligned with the right liquid inlet window (1402), and the second right axial groove (c) is aligned with the right liquid outlet window (1403); the second left chamber (H) is sequentially fed with liquid through a liquid inlet channel of the right metering unit and the second left axial groove (d), and the second right chamber (J) is sequentially discharged with liquid through the second right axial groove (c) and a liquid discharge channel of the right metering unit;
in the left cylinder body (4), a left piston (5) is driven by a right piston (17) to rotate along the circumferential direction and is forced to move along the axial direction to the right by the movement of an outer guide rail (9) and a rolling type transmission device; the first left axial groove (a) is not communicated with the left liquid inlet window (403) or the left liquid outlet window (404), the first right axial groove (b) is not communicated with the left liquid inlet window (403) or the left liquid outlet window (404), the first left chamber (C) is not filled with liquid or drained of liquid, and the first right chamber E is not filled with liquid or drained of liquid;
in the second state:
in the left cylinder body (4), liquid drives the left piston (5) to move rightwards, and the left piston (5) is forced to rotate along the circumferential direction by the movement of the outer guide rail (9) and the overlapping and rolling type transmission device; the first left axial groove (a) is aligned with the left liquid inlet window (403), and the first right axial groove (b) is aligned with the left liquid outlet window (404); the first left chamber (C) is sequentially fed with liquid through a liquid inlet channel of the left metering unit and the first left axial groove (a), and the first right chamber (E) is sequentially discharged with liquid through the first right axial groove (b) and a liquid discharge channel of the left metering unit;
in the right cylinder body (14), a right piston (17) is driven by a left piston (5) to rotate along the circumferential direction and is forced to move along the axial direction to the left by the movement of an inner guide rail (10) and a rolling type transmission device; the second left axial groove (d) is not communicated with the right liquid inlet window (1402) or the right liquid outlet window (1403), and the second right axial groove (c) is not communicated with the right liquid inlet window (1402) or the right liquid outlet window (1403); the second left chamber (H) neither feeds nor discharges liquid, and the second right chamber (J) neither feeds nor discharges liquid;
in the third state:
in the right cylinder body (14), the liquid drives the right piston (17) to move leftwards, and the right piston is forced to rotate along the circumferential direction by the movement of the inner guide rail (10) and the overlapped rolling type transmission device; the second right axial groove (c) is aligned with the right liquid inlet window (1402), and the second left axial groove (d) is aligned with the right liquid outlet window (1403); the second right chamber (J) sequentially passes through a liquid inlet channel of the right metering unit and a second right axial groove (c) to feed liquid; the second left chamber (H) discharges liquid through a second left axial groove (d) and a liquid discharge channel of the right metering unit in sequence;
in the left cylinder body (4), a left piston (5) is driven by a right piston (17) to rotate circumferentially and moves leftwards along the axial direction under the force of the movement of an outer guide rail (9) and a rolling type transmission device; the first left axial groove (a) is not communicated with the left liquid inlet window (403) or the left liquid outlet window (404), the first right axial groove (b) is not communicated with the left liquid inlet window (403) or the left liquid outlet window (404), the first left chamber (C) is not filled with liquid or drained of liquid, and the first right chamber E is not filled with liquid or drained of liquid;
in the fourth state:
in the left cylinder body (4), the liquid drives the left piston (5) to move leftwards, and the left piston (5) rotates along the circumferential direction under the action of the outer guide rail (9) and the movement of the overlapping and rolling type transmission device; the first left axial groove (a) is aligned with the left liquid outlet window (404), and the first right axial groove (b) is aligned with the left liquid inlet window (403); the first right chamber E sequentially enters liquid through a liquid inlet channel of the left metering unit and the first right axial groove (b), and the first left chamber C sequentially discharges liquid through the first left axial groove (a) and a liquid discharge channel of the left metering unit;
in the right cylinder body (14), the right piston and the right cylinder body (14), the right piston (17) is driven by the left piston (5) to rotate along the circumferential direction and is forced to move along the axial direction to move rightwards by the movement of the inner guide rail (10) and the overlapping and rolling type transmission device; the second left axial groove (d) is not communicated with the right liquid inlet window (1402) or the right liquid outlet window (1403), and the second right axial groove (c) is not communicated with the right liquid inlet window (1402) or the right liquid outlet window (1403); the second left chamber (H) neither feeds nor drains liquid, and the second right chamber (J) neither feeds nor drains liquid.
2. A stacked rolling type duplex two-dimensional piston dynamic flowmeter according to claim 1, characterized in that: be equipped with on the center pin of concentric ring (3) and supply left piston (5) or right piston (17) insert and the concentric ring hole that removes, be equipped with constant head tank (302) on the periphery of concentric ring (3), the interval is equipped with four left radial positioning through-holes 402 on the internal wall face of left cylinder body (4), the interval is equipped with four right radial positioning through-holes 1404 on the internal wall face of right cylinder body (14), left side radial positioning through-hole 402 right radial positioning through-hole 1404 respectively with correspond constant head tank (302) on concentric ring (3) pass through locating pin (6) fixed connection, thereby realize concentric ring (3) are in left cylinder body (4) or axial positioning on right cylinder body (14).
3. A stacked rolling type duplex two-dimensional piston dynamic flowmeter according to claim 1, characterized in that: the left liquid inlet window (403) and the left liquid outlet window (404) are rectangular inclined holes, and the adjacent left liquid inlet window (403) and the left liquid outlet window (404) are circumferentially spaced by 45 degrees and are respectively forked left and right along the axial direction to form an included angle of 90 degrees;
the right liquid inlet window (1402) and the right liquid outlet window (1403) are rectangular inclined holes, and the right liquid inlet window (1402) and the right liquid outlet window (1403) are adjacent to each other, are circumferentially spaced by 45 degrees and are respectively left and right diverged along the axial direction to form an included angle of 90 degrees.
4. A stacked rolling type duplex two-dimensional piston dynamic flowmeter according to claim 1, characterized in that: the left cylinder body (4) is in interference fit with a left third axial hole (201) of the left shell (2), and the left piston (5) is in clearance fit with a left cylinder body inner hole (401) of the left cylinder body (4); the right cylinder (14) is in interference fit with a right shell inner hole (1605) of the right shell (16), and the right piston (17) is in clearance fit with a right cylinder inner hole (1401) of the right cylinder;
the first shoulder is provided with two first left radial communication holes (501) used for respectively communicating the two axisymmetric first left axial grooves (a), and the first shoulder is also provided with two first right radial communication holes (502) used for respectively communicating the two axisymmetric first right axial grooves (b); and the second shoulder is provided with two second left radial communication holes (1701) for respectively communicating the two axisymmetric second left axial grooves (d), and the second shoulder is also provided with two second right radial communication holes (1702) for respectively communicating the two axisymmetric second right axial grooves (c).
5. A stacked rolling type duplex two-dimensional piston dynamic flowmeter according to claim 1, characterized in that: a first one-way valve (15) is arranged in the left seventh axial hole (211), and the opening of a working end (P1) faces to a left sixth axial hole (210); the sixth right axial hole (1611) is provided with a second one-way valve (15), and the opening of the working end (P1) faces to the seventh right axial hole (1610).
6. A stacked rolling type duplex two-dimensional piston dynamic flowmeter according to claim 1, characterized in that: the cross shaft (23) comprises four plate bodies which are vertically intersected to form the cross shape, the two sides of each plate body are recessed to form elongated slots (2301), and ball strips are arranged in the eight elongated slots (2301);
the inboard of first axle arm is equipped with the edge first V type slide (703) that the center pin direction extends, the inboard of second axle arm is equipped with the edge second V type slide (1301) that the center pin direction extends, be equipped with the ball on the ball strip, the ball rotationally pastes and establishes corresponding first V type slide (703) or on second V type slide (1301).
7. A stacked rolling type duplex two-dimensional piston dynamic flowmeter according to claim 1, characterized in that: a left flat groove (503) is formed in the left end of the left piston (5), and the first lock catch (701) is buckled on the left flat groove (503); the left end of the right piston (17) is provided with a right flat groove (1703), and the second lock catch (1304) is buckled on the right flat groove (1703).
8. A stacked rolling type duplex two-dimensional piston dynamic flowmeter according to claim 1, characterized in that: the cone roller (1101) is provided with a conical surface (1101a), a cone roller cavity (1101b) is formed in the cone roller (1101), one end of a cone roller shaft (1102) is fixedly inserted into the cone roller cavity (1101b), the other end of the cone roller shaft rotatably penetrates through a left conical hole (1202) or a right conical hole (1205) in the laminated roller shell (12) and is connected with a roller sleeve (1103) for preventing slipping, and the roller sleeve (1103) is buckled on a step surface (1204) of the left conical hole (1202) or the right conical hole (1205).
9. A stacked rolling type duplex two-dimensional piston dynamic flowmeter according to claim 1, characterized in that: the inner ring wall surface of the outer guide rails (9) is provided with first sliding buckle grooves (904), and the first sliding buckle grooves (904) of the two outer guide rails (9) are respectively embedded with a first sliding buckle (702) and a second sliding buckle (704) on the outer shaft (7);
the inner wall ring surface of the inner guide rail (10) is provided with second sliding buckle grooves (1002), and the second sliding buckle grooves (1002) on the two inner guide rails (13) are respectively embedded with a third sliding buckle (1302) and a fourth sliding buckle (1303) on the inner shaft (13).
10. A stacked rolling type duplex two-dimensional piston dynamic flowmeter according to claim 1, characterized in that: a left first axial hole (205) and a left second axial hole (206) are formed in the left end face of the left shell (2); a right first axial hole (1608) and a right second axial hole (1609) are arranged on the right end face of the right shell (16);
the left sensor assembly (1) comprises a left knob (19), a left coil framework (20), a left isolation sleeve (21) and a left permanent magnet (22); wherein: the left knob (19) is fixedly connected with the left shell (2) through threads, the left coil framework (20) is tightly pressed in the left first axial hole (205) through the left knob (19), the left permanent magnet (22) is axially movably sleeved in the left isolation sleeve (21), and the right end of the left permanent magnet (22) penetrates through the left second axial hole (206) and is fixedly connected with the left end face of the left piston (5) through a bolt, so that the left permanent magnet (22) and the left piston (5) keep synchronous motion;
the structure of the right sensor assembly (18) is the same as that of the left sensor assembly (1), and the right sensor assembly (18) comprises a right knob, a right coil framework, a right isolation sleeve and a right permanent magnet; wherein: the right knob is fixedly connected with the right shell through threads, the right coil framework is tightly pressed in the right first axial hole (1608) through the right knob, the right permanent magnet is sleeved in the right isolation sleeve in an axially movable mode, and the right end of the right permanent magnet penetrates through the right second axial hole (1609) and is fixedly connected with the right end face of the right piston (17) through a bolt, so that the right permanent magnet and the right piston (17) keep synchronous motion.
CN202110581240.5A 2021-05-27 2021-05-27 Fold and roll type pair two dimension piston dynamic flowmeter Active CN113324606B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103344309A (en) * 2013-06-08 2013-10-09 浙江省计量科学研究院 Electrically-driven symmetric plunger gas micro flow standard device
US20170029177A1 (en) * 2014-04-16 2017-02-02 Reckitt Benckiser (Brands) Limited Dosing Dispensing Closure
CN110346007A (en) * 2018-04-08 2019-10-18 浙江工业大学 Duplex two dimension piston-type flow-meter
CN111366206A (en) * 2018-12-26 2020-07-03 浙江工业大学 Movable guide rail type flowmeter
CN111750949A (en) * 2020-07-07 2020-10-09 河南航天液压气动技术有限公司 Two-dimensional bidirectional flowmeter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103344309A (en) * 2013-06-08 2013-10-09 浙江省计量科学研究院 Electrically-driven symmetric plunger gas micro flow standard device
US20170029177A1 (en) * 2014-04-16 2017-02-02 Reckitt Benckiser (Brands) Limited Dosing Dispensing Closure
CN110346007A (en) * 2018-04-08 2019-10-18 浙江工业大学 Duplex two dimension piston-type flow-meter
CN111366206A (en) * 2018-12-26 2020-07-03 浙江工业大学 Movable guide rail type flowmeter
CN111750949A (en) * 2020-07-07 2020-10-09 河南航天液压气动技术有限公司 Two-dimensional bidirectional flowmeter

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