CN113497498A

CN113497498A - Interlink rotor variable displacement pump

Info

Publication number: CN113497498A
Application number: CN202010198802.3A
Authority: CN
Inventors: 周承岗
Original assignee: Pan Tianteng Shenzhen Technology Co ltd
Current assignee: Pan Tianteng Shenzhen Technology Co ltd
Priority date: 2020-03-20
Filing date: 2020-03-20
Publication date: 2021-10-12

Abstract

Interlink rotor variable displacement pump constitutes the varactor space through a plurality of rotors interlink conjugate distribution, simultaneously, the rotation of rotor can change the volume in varactor space, and it is pumping module itself also, because varactor integrated configuration is simpler, conveniently reduces the increase range of volume and weight through the subassembly sharing when adopting composite construction moreover, has apparent advantage on power weight ratio, can regard as the pump pusher of mobile device such as car, ship, aircraft even. In addition, local schemes such as moving a triangular gathering point, abrasion compensation inclination angle, spiral flow distribution, spiral pressurization, an outer layer of a movable rotor, a double-rotor hollow motor, intelligent control and the like are adopted by combining the characteristics of a interlinked rotor structure, and the comprehensive performance is cooperatively improved.

Description

Interlink rotor variable displacement pump

Technical Field

The present invention relates to a variable displacement pump.

Background

The pump is divided according to the working principle and mainly comprises two main flow types of a variable displacement pump and a power pump, wherein the variable displacement pump comprises a reciprocating pump and a rotor pump. The reciprocating pump pumps fluid by means of reciprocating motion of the piston, the flow obtained by a single working cycle is large, but a reciprocating motion mechanism and a flow distribution device such as a one-way valve, a flow distribution plate and the like are required to work in a matched mode, and the structure is complex. The rotor pump is of a gear pump type, a cam pump type and the like, the working principle is that fluid in a small space between a rotor and a pump shell is carried from a low-pressure area to a high-pressure area by means of continuous rotation of a gear rotor or a cam rotor and is discharged through meshing between the rotors and is left in the high-pressure area, a flow distribution device can be omitted in the working process, the structure is simpler compared with a reciprocating pump, the output pulsation is smaller, but the common defect of the conventional variable-capacity pump is still overcome, namely the variable-capacity combination must comprise a variable-capacity space and a pumping assembly moving relative to the variable-capacity space, the special key assembly at least comprises two assemblies with different shapes and functions, the key assembly of the variable-capacity combination of the reciprocating pump is a piston and a cylinder barrel, and the key assembly of the variable-capacity working combination of the rotor pump is a rotor and a pump shell. The normal operation of the variable volume combination has higher requirements on the shape of the components, and also ensures the matching precision and the installation precision between the components, the more the types of key components are, the more the types of the key components are, the more the key components are, the lower the manufacturing cost is, when the power is enlarged, the motion inertia is balanced or the pulsation is reduced by increasing the number of units, the more the mechanism repeatability is caused by the fact that the components are not convenient to share, the size, the weight and the cost can also be increased in a large equivalent proportion, the improvement of the power-weight ratio is not facilitated, and the application range of the pump is limited.

Disclosure of Invention

The invention aims to provide a variable displacement pump, which forms a variable displacement space by interlinking and conjugate distribution of a plurality of rotors, simultaneously, the rotation of the rotors can change the volume of the variable displacement space, the variable displacement pump is a pumping assembly, and the variable displacement pump has a simpler variable displacement combined structure, is convenient to reduce the increase range of volume and weight by sharing assemblies when adopting a composite structure, has remarkable advantages in power-weight ratio, and can even be used as a pump pushing device of mobile equipment such as vehicles, ships, aircrafts and the like. On the basis, local schemes such as moving a three-edge gathering point, compensating an inclination angle by abrasion, distributing flow in a spiral mode, pressurizing in a spiral mode, moving the outer layer of a rotor, a double-rotor hollow motor, intelligent control and the like are adopted by combining the characteristics of a interlinked rotor structure, and the comprehensive performance is improved in a synergistic mode.

The invention has a plurality of rotors which are distributed in a chain, and the rotors are dynamically conjugated in front and back to form a central variable volume space in a surrounding way, or an outer ring is arranged on the periphery of the chain structure to form a peripheral variable volume space, and the volume of the peripheral variable volume space of the central variable volume space can be changed along with the rotation of the rotors.

The cross section of the rotor is an equal-width triangle or a curve which is modified on the basis of the equal-width triangle, the three rotors form a interlinking unit, the rotor is provided with a working section with a straight appearance, and a flow distribution device is connected with a variable-volume space.

The cross section of the rotor is an equal-width triangle or a curve which is modified on the basis of the equal-width triangle, the three rotors form a interlinking unit, the rotor is provided with a spiral working section, three edges from the three rotors can be gathered at the central axis position of the interlinking unit, and the three-edge gathering point can move in the axial direction along with the rotation of the rotor to pump fluid.

The flow distribution mode adopted by the invention comprises spiral flow distribution, shaft flow distribution, disc flow distribution or valve flow distribution.

The rotor of the invention has a spiral pressurizing structure, and in the same spiral rotor, the pitch of the inlet end is larger than that of the outlet end, so that the fluid can be pressurized along the way.

The rotor of the invention can be wear compensated by axial movement.

The rotor structure comprises one of the following schemes or the combination thereof, wherein edges of the rotor are sharp corners and can be connected in a seamless way at the center position; or the edge of the rotor is embedded with a straight strip or spiral sealing strip; or the seamed edge of the rotor is an outer circular arc, and a sealing core with an inner circular arc is arranged in the center of the central variable volume space and matched with the sealing core; or the rotor is provided with an outer cladding layer which can play a role in sealing, absorbing deformation, resisting abrasion and friction, resisting corrosion or pollution; or the rotor is provided with a movable outer cladding, the outer surface of the rotor is a friction surface or a tooth form for playing a role of transmission or sealing, and the motion resistance between the outer cladding is larger than that between the outer cladding and the rotor so as to realize relative rolling.

The driving device of the invention adopts a double-rotor hollow motor which is provided with a central hole as a fluid channel or used for installing a fluid pipeline, and the motor rotor comprises an outer rotor and an inner rotor, can apply a rotating couple to a rotating shaft of the rotor, and plays roles of increasing torque and synchronous transmission.

The invention at least has one of the following composite structures, namely, the same rotor comprises more than two working sections with different phases or shapes; the whole device comprises more than two interlinked units, and a common rotor is arranged between different interlinked units; the whole device comprises interlinked structural units with different rotation directions; the whole device comprises more than two serial interlinked units.

The invention has an intelligent control system.

Drawings

FIG. 1 is an axial view of a flat rotor embodiment;

FIG. 2 is a radial view of a flat rotor embodiment;

FIG. 3 is an axial view of a helical rotor embodiment;

FIG. 4 is a radial view of a helical rotor embodiment;

FIG. 5 is a radial view of a helical port rotor configuration;

FIG. 6 is an axial view of a helical port rotor configuration;

FIG. 7 is a shaft flow arrangement;

FIG. 8 is a central seal post structure;

FIG. 9 is a rotor structure in which the outer cladding and the inner cladding are movable relative to each other;

FIG. 10 is a composite structure having a plurality of interlinked units.

Detailed Description

The invention has a plurality of rotors which are distributed in a chain, and the rotors are dynamically conjugated in front and back to form a central variable volume space in a surrounding way, or an outer ring is arranged on the periphery of the chain structure to form a peripheral variable volume space, and the volume of the peripheral variable volume space of the central variable volume space can be changed along with the rotation of the rotors. Referring to the embodiment of fig. 1 and 2, three rotation shafts 3 are rotatably connected with structural members such as a base 4 and an end cover 5, and are distributed in an equilateral triangle pattern; the rotor 2 is connected with the rotation shaft 3 at the center point thereof, takes the rotation shaft 3 as the rotation center, and is arranged in a gapless and interlinked way in the front and the back; the cross section of the rotor 2 is a triangle with equal width or a curve modified on the basis of the triangle with width, the autorotation phases of the three rotors 2 are the same, the cross section curves of the three rotors 2 at the same axial position can be mutually conjugated back and forth to form a central variable volume space in a surrounding manner, or the periphery of the interlinking structure is also provided with an outer ring 1 fixedly connected with a base 4 and an end cover 5, and the outer ring and the rotors 2 form a peripheral variable volume space together; the volume of the central or peripheral volume-changing space may be varied with the synchronous rotation of the rotor 2, thereby pumping fluid; the synchronizing device comprises a gear 7 fixedly connected with the rotating shaft 3 and a synchronizing ring gear 6 which is simultaneously driven by the gears 7, and can enable the rotors 2 to synchronously rotate; there is a motor or other type of power device to drive the synchronizing ring gear 6. The shape of the cross section of the rotor 2 is not limited to the constant-width triangle in the present embodiment, but may be any other type of curve that satisfies the following two conditions — firstly, the curve can be distributed in a chain and maintain the front-back dynamic conjugation to form a variable volume space, and secondly, the volume of the variable volume space can be changed during rotation, such as a constant-width pentagon, an oval, an oblong, an ellipse, or an "8" shape. The synchronizing means may synchronize the rotation of the rotor 2, of a type including, but not limited to, mechanical, electronic, variable frequency, hydraulic or pneumatic. When the unequal-width curve rotors are selected, the sizes of the rotors 2 in the same interlinking structure are not required to be equal, the number of the rotors is not limited to three, the rotating speed and the phase of the synchronous rotating finger have definite functional relation, and the rotating speed and the phase are not required to be the same. The driving device can be a traditional motor which drives the rotor 2 through a transmission shaft, can also be a direct-drive motor with a motor rotor arranged in the rotor 2, and can also be a power device such as an engine, a hydraulic device, a wind power device, a solar device or a manual device. The base 4, the end cover 5 and other structural components have basic functions of connection, fixation and the like, and simultaneously can have other functions of sealing or flow distribution and the like.

The cross section of the rotor is an equal-width triangle or a curve which is modified on the basis of the equal-width triangle, the three rotors form a interlinking unit, the rotor is provided with a working section with a straight appearance, and a flow distribution device is connected with a variable-volume space. Referring to the embodiment of fig. 1 and 2, three rotation shafts 3 are rotatably connected with structural members such as a base 4 and an end cover 5, and are distributed in an equilateral triangle pattern; the rotor 2 is connected with the rotation shaft 3 at the center point thereof, and is in gapless serial distribution from front to back by taking the rotation shaft 3 as the rotation center; the cross section of the rotor 2 is an equal-width triangle or a modified curve based on the equal-width triangle, the self-rotation phases of the three rotors 2 are the same, and the outer curved surfaces of the cross sections of the three rotors 2 at the same axial position can be conjugated back and forth to form a central variable volume space; the radial size and volume of the variable volume space can be changed along with the synchronous rotation of the rotor 2, so that the fluid is pumped; the rotor 2 is provided with a working section with a straight appearance, the outer curved surface of the rotor is formed by a linear bus moving around the rotating shaft 3, the cross sections at different axial positions are the same or similar in shape and are in the same phase; when the rotor 2 rotates in one direction, the pressure in the variable volume space changes into low pressure and high pressure which alternate repeatedly, in order to realize one-way continuous work, a flow distribution device is connected with the variable volume space, and the high pressure area or the low pressure area is disconnected or connected in cooperation with the conversion of the stroke; types of distribution patterns include, but are not limited to, spiral distribution, axial distribution, disk distribution, or valve distribution.

The cross section of the rotor is an equal-width triangle or a curve which is modified on the basis of the equal-width triangle, the three rotors form a interlinking unit, the rotor is provided with a spiral working section, three edges from the three rotors can be gathered at the central axis position of the interlinking unit, and the three-edge gathering point can move in the axial direction along with the rotation of the rotor to pump fluid. Referring to the embodiment of fig. 3 and 4, three rotation shafts 13 are rotatably connected to the base 14, the end cap 16 and other structural members, and are distributed in an equilateral triangle pattern; the rotor 12 is connected with the rotation shaft 13 at the center point thereof, takes the rotation shaft 13 as the rotation center, and is continuously distributed without gaps in the front and the back; the cross section of the rotor 12 is a triangle with equal width or a modified curve based on the triangle with equal width, and the phase of the cross section of the same rotor 12 is gradually changed at different axial positions so that the rotor 12 has a spiral shape; the screw pitches and the helix angles of different rotors at the same axial position are equal in size, the cross sections are the same and are in the same rotation phase, so that the rotors can be in front and back conjugation to form a central variable-volume space at the whole helical working section; the three edges from the three rotors 12 are gradually gathered or separated along the spiral line, so that the variable volume space has different cross sectional areas at different axial positions, the three edges simultaneously reach the axial position closest to the central axis of the interlinking unit, the cross sectional area of the variable volume space is minimum, and the three-edge gathering point can axially move along with the rotation of the rotors 12 to pump fluid; the continuous space between two axially adjacent triangular gathering points is a completely closed space, and the continuous space between one triangular gathering point and the base 14 or the end cover 16 is a semi-closed space; when a triangular gathering point moves axially, semi-closed spaces in front of and behind the triangular gathering point are respectively connected with a high-pressure area and a low-pressure area through an outlet 15 and an inlet 17, and the volumes of the semi-closed spaces gradually become smaller and larger respectively; when the rotor 12 rotates unidirectionally, the movement of the three-edged accumulation points is also unidirectionally circulated, at least one three-edged accumulation point exists in one interlinking unit at any moment, so that the outlet 15 and the inlet 17 cannot be directly communicated, or although the three-edged accumulation points have a blank window period for blocking a variable-volume space, the fluid has enough velocity inertia and cannot flow backwards when the outlet 15 and the inlet 17 are temporarily directly communicated, so that a flow distribution device is not needed to repeatedly connect or disconnect a high-pressure area or a low-pressure area of the fluid in the working process.

The flow distribution mode adopted by the invention comprises spiral flow distribution, shaft flow distribution, disc flow distribution or valve flow distribution. The spiral flow distribution is a flow distribution mode which causes three-edge convergence points of three equal-width triangular spiral rotors to be continuously generated and disappeared in the axial movement process through the rotation of the three equal-width triangular spiral rotors, so that channels of variable-capacity spaces are periodically disconnected or opened. Fig. 5 and 6 show a straight rotor with a spiral flow distribution section, which is formed by fixedly connecting a middle straight working section 24 with an inlet spiral section 23 and an outlet spiral section 25 at two ends, and three rotors form a interlinked structural unit; the spiral directions of the outlet spiral section 23 and the inlet spiral section 25 are the same, three sections of spiral edges are uniformly distributed in the circumferential direction, and the spiral edges of the outlet spiral section 23 and the inlet spiral section 25 are staggered in phase; the circumferential angle of each section of the spiral rib corresponding to the circumferential direction is at least 60 degrees, and the six special positions from the beginning to the end are arranged in the cross section of the straight working section 24 marked by the dotted line in FIG. 6; when the three rotors synchronously rotate, the triangular convergence point of the outlet spiral section 23 and the triangular convergence point of the inlet spiral section 25 alternately generate and disappear, and the variable volume space is opened or closed in the outlet or inlet direction by matching with the period of the straight working section 24; in order to avoid the break point in the connection of the three-edge convergent points in the outlet direction and the inlet direction, the corresponding circumferential angle of each section of the spiral edge in the circumferential direction can be reserved with a transition allowance. The shaft flow distribution structure is shown in fig. 7, in which a rotor 26 is integrally connected to a rotation shaft 30, the rotation shaft 30 is rotatably connected to a base 29, a groove 27 is formed inside the base 29 in the variable volume space, and a groove 28 is formed in the rotation shaft 30, one end of which is connected to a high pressure region or a low pressure region of fluid, and the other end of which is periodically connected to or disconnected from the groove 27 as the rotation shaft 30 rotates. The distribution may also be a conventional disc distribution or a valve distribution.

The rotor of the invention has a spiral pressurizing structure, and in the same spiral rotor, the pitch of the inlet end is larger than that of the outlet end, so that the fluid can be pressurized along the way. Referring to fig. 4, the volume of the fully enclosed volume-changing space formed by the helical rotor 12 is determined by the radial dimension of the rotor and the pitch, and the larger the pitch, the larger the volume, given a given radial dimension. In the application that the working medium is compressible fluid, in order to increase the compression ratio by pressurizing the fluid along the way, the spiral rotor 12 is made into a variable pitch structure, and the pitch is reduced from the inlet 17 to the outlet 15.

The rotor of the invention can be wear compensated by axial movement. In the embodiment of fig. 2, the axis L1 of the rotation shaft 3 is parallel to the central axis L0 of the interlinking structure, or the different axes L1 have a uniform inclination angle with respect to the central axis L0; the cross sections of the rotors 2 at different axial positions are the same, namely the shape and the size are the same, or the cross sections of the rotors 2 at different axial positions are similar in shape but gradually change in area in the axial direction; the aforementioned situations that the axis L1 intersects or is parallel to the central axis L0 and the cross section of the rotor 2 is changed or not changed in the axial direction can be combined into three embodiments, namely, the axis is parallel and the section area is unchanged, the axis is parallel and the section area is changed, and the axis is not parallel and the section area is changed, and the rotors 2 of the latter two can perform wear compensation through axial movement; the embodiment of the screw type rotor also performs wear compensation in the same manner.

The rotor structure comprises one of the following schemes or the combination thereof, wherein edges of the rotor are sharp corners and can be connected in a seamless way at the center position; or the edge of the rotor is embedded with a straight strip or spiral sealing strip; or, as shown in fig. 8, the edge of the rotor 31 is an outer arc, and a sealing post 32 with an inner arc is fixedly arranged at the center of the central variable volume space to match with the outer arc; or the rotor is provided with an outer cladding layer which can play a role in sealing, absorbing deformation, resisting abrasion and friction, resisting corrosion or pollution; alternatively, as shown in fig. 9, the rotor 37 has a movable envelope 36 with a lubricant or roller 35 between its inner surface and the rotor 37 to reduce the resistance to movement, and the outer surface is a friction surface or has a tooth profile for transmission and sealing so that the resistance to movement between the different envelopes 36 is greater than the resistance to movement between the envelopes 36 and the rotor 37 and thus relative rolling is possible.

The driving device of the invention adopts a double-rotor hollow motor which is provided with a central hole as a fluid channel or used for installing a fluid pipeline, and the motor rotor comprises an outer rotor and an inner rotor, can apply a rotating couple to a rotating shaft of the rotor, and plays roles of increasing torque and synchronous transmission. Referring to fig. 4, the inlet 17 and the outlet 15 of the variable volume space are located at the center of the interlinking structure, and in order to simplify the structure and save space, the motor adopts a central coaxial structure, and comprises an inner rotor 21, a stator 22 and an outer rotor 20 from inside to outside; the inner rotor 21 is provided with a central hole to serve as a fluid passage or to mount a fluid conduit; the inner rotor 21 and the outer rotor 20 of the motor have opposite rotating directions and are provided with transmission teeth, and can be meshed with the gear 19 on the rotating shaft 18 from the inner side and the outer side respectively to apply circumferential couple to the gear, so that a special speed reducer and a special synchronizing device are not needed to play a role in increasing torque and synchronizing transmission.

The invention at least has one of the following composite structures, namely, the same rotor comprises more than two working sections with different phases or shapes; the whole device comprises more than two interlinked units, and a common rotor is arranged between different interlinked units; the whole device comprises interlinked structural units with different rotation directions; the whole device comprises more than two serial interlinked units. As in the embodiment of the straight rotor shown in fig. 2, the same rotor 2 may have more than two working sections with different phases, and the partition plate is disposed between the working sections to form variable volume spaces with different working phases, thereby reducing output pulsation. As shown in FIG. 10, the whole device comprises more than two link units, a shared rotor is arranged between adjacent link units, the proportion of the number of the shared rotors is higher when the number of the link units is larger, the number ratio of the rotors to the link units is 3:1, 4:2, 5:3 … … 12:12, 13:14 … … 21:25 … … before the 12:12 inflection point, the increasing speed of the number of the link units is higher than that of the rotors, the contribution to improving the power-to-weight ratio is more obvious when the number of the link units is larger, the power is still economical when the number of the unit structures is increased in a larger range after the inflection point, the effect is more remarkable when the central variable-volume space and the peripheral variable-volume space are both used, and the advantage is far superior to that of a common pump and even can be used as a vehicle, A pump pusher for a mobile device such as a ship or an aircraft. The whole device comprises interlinkage structure units with different rotation directions, so that adverse effects of reaction torque during rotation of the rotor can be eliminated. In the application that the working medium is compressible fluid, in order to improve the compression ratio or the vacuum degree, the integral device comprises more than two serial units in a downstream relationship, and the output of an upstream unit is the input of a downstream unit.

The intelligent control system is provided with an intelligent control system, comprises a sensor, an electric control unit or an execution element, and can monitor or intelligently control indexes such as motor rotating speed, fluid pressure, output flow, internal temperature, noise, abrasion loss, leakage amount or running time.

Claims

1. Interlink rotor variable-capacity pump, including rotor, synchronizer, drive arrangement and structure, its characterized in that has a plurality of rotors to interlink and distributes, and the front and back developments conjugation surrounds formation center variable-capacity space, perhaps, has the outer loop in this interlink structure's periphery and forms periphery variable-capacity space in addition, and the volume in center variable-capacity space periphery variable-capacity space can change along with the rotation of rotor.

2. The interlinked rotor variable displacement pump according to claim 1, wherein the cross section of the rotors is an equilateral triangle or a modified curve based on the equilateral triangle, the three rotors form an interlinked unit, the rotors have straight working sections, and a flow distribution device is connected to the variable displacement space.

3. The tandem rotor positive displacement pump according to claim 1, wherein the cross-section of the rotor is a triangle with equal width or a modified curve based on the triangle with equal width, the three rotors form a tandem unit, the rotors have spiral working sections, three edges from the three rotors can be gathered at the central axis position of the tandem unit, and the three-edge gathering point can move in the axial direction along with the rotation of the rotors to pump fluid.

4. The tandem rotor positive displacement pump according to claim 2, wherein the distribution pattern comprises a spiral distribution, a shaft distribution, a disc distribution or a valve distribution.

5. A tandem rotor positive displacement pump according to claim 3, wherein the rotors have a helical pumping arrangement, and the inlet end has a greater pitch than the outlet end in the same helical rotor, thereby to allow fluid to be pumped therealong.

6. A tandem rotor positive displacement pump according to claim 1, 2, 3, 4 or 5, wherein the rotors are adapted to compensate for wear by axial movement.

7. The tandem rotor positive displacement pump according to claim 6, wherein the rotor structure comprises one or a combination of the following schemes that the edges of the rotors are sharp and can be seamlessly connected with each other at the central position; or the edge of the rotor is embedded with a straight strip or spiral sealing strip; or the seamed edge of the rotor is an outer circular arc, and a sealing core with an inner circular arc is arranged in the center of the central variable volume space and matched with the sealing core; or the rotor is provided with an outer cladding layer which can play a role in sealing, absorbing deformation, resisting abrasion and friction, resisting corrosion or pollution; or the rotor is provided with a movable outer cladding, the outer surface of the rotor is a friction surface or a tooth form for playing a role of transmission or sealing, and the motion resistance between the outer cladding is larger than that between the outer cladding and the rotor so as to realize relative rolling.

8. The tandem rotor positive displacement pump according to claim 1, 2, 3, 4, 5 or 7, wherein the driving device is a dual rotor hollow motor having a central hole for fluid passage or for installing fluid conduits, and the motor rotor comprises an outer rotor and an inner rotor, and a rotating couple can be applied to the rotating shaft of the rotor to increase torque and synchronize transmission.

9. The tandem rotor positive displacement pump according to claim 8, wherein at least one of the following composite structures is provided-the same rotor includes more than two working sections with different phases or shapes; the whole device comprises more than two interlinked units, and a common rotor is arranged between different interlinked units; the whole device comprises interlinked structural units with different rotation directions; the whole device comprises more than two serial interlinked units.

10. A tandem rotor positive displacement pump according to claim 1, 2, 3, 4, 5, 7 or 9, characterized by having an intelligent control system.