CN112360677A

CN112360677A - Hydraulic centrifugal force driving device

Info

Publication number: CN112360677A
Application number: CN202011383849.3A
Authority: CN
Inventors: 杨甫在
Original assignee: Guangxi Xingyun Electric Machinery Manufacturing Co ltd
Current assignee: Guangxi Xingyun Electric Machinery Manufacturing Co ltd
Priority date: 2020-12-01
Filing date: 2020-12-01
Publication date: 2021-02-12

Abstract

The invention relates to the technical field of drivers, and discloses a hydraulic centrifugal force driving device which comprises a centrifugal pump, a potential energy receiving device, a hydraulic motor and a gearbox, wherein the centrifugal pump comprises a pump shell, a main shaft, a vane wheel and an output shaft, a liquid containing cavity for containing liquid is arranged in the pump shell, the potential energy receiving device comprises an outer ring chamber, a receiving wheel is rotatably assembled in the outer ring chamber and is in transmission connection with the output shaft, receiving blades are arranged on the receiving wheel, the hydraulic motor comprises a shell and a rotating wheel, a first channel and a second channel are formed in the pump shell, the main shaft is in transmission connection with the output end of the gearbox, and the rotating wheel is in transmission connection with the input end of the. The rotating kinetic energy of the rotating wheel is accelerated by the gearbox and then transmitted to the main shaft of the centrifugal pump, so that the main shaft is driven to rotate in an accelerating mode, namely, the pressure energy of the liquid is transmitted to the main shaft through the hydraulic motor and the gearbox, the pressure energy is converted into the kinetic potential energy of the liquid, the kinetic potential energy is transmitted to the output shaft through the receiving wheel to do work outwards, the energy conversion efficiency is improved, and energy is saved.

Description

Hydraulic centrifugal force driving device

Technical Field

The invention relates to the technical field of drivers, in particular to a hydraulic centrifugal force driving device.

Background

The hydraulic driver is a common driving device in modern equipment, liquid is driven to rotate at a high speed through a centrifugal pump, and an output shaft is driven to rotate and output power by utilizing the high-speed rotation of the liquid. The liquid generates centrifugal force when rotating at high speed, and meanwhile, the liquid rotating at high speed has motion potential energy.

Disclosure of Invention

The purpose of the invention is: the utility model provides a hydraulic pressure centrifugal force drive arrangement, can utilize centrifugal force and movement potential energy simultaneously, solved the energy waste great problem that exists among the prior art.

In order to achieve the above purpose, the invention provides a hydraulic centrifugal force driving device, which comprises a centrifugal pump, a potential energy receiving device, a hydraulic motor and a gearbox, wherein the centrifugal pump comprises a pump shell, a main shaft rotationally assembled on the pump shell, a vane wheel rotationally assembled on the main shaft in a stop way, and an output shaft rotationally assembled on the pump shell, a liquid containing cavity for containing liquid is arranged in the pump shell, the output shaft and the vane wheel are in transmission connection through the potential energy receiving device, the potential energy receiving device comprises an outer ring chamber communicated with the liquid containing cavity, a receiving wheel is rotationally assembled in the outer ring chamber, the receiving wheel is in transmission connection with the output shaft, receiving blades are arranged on the receiving wheel, the hydraulic motor comprises a shell and a rotating wheel rotationally assembled in the shell, a first channel for communicating the outer ring chamber with a liquid inlet of the hydraulic motor is formed in the pump shell, The centrifugal pump is characterized by comprising a liquid containing cavity, a first channel, a second channel, a main shaft, a transmission case, a rotating wheel, a transmission case and a transmission device, wherein the first channel is communicated with the liquid containing cavity and a liquid outlet of the hydraulic motor, the main shaft of the centrifugal pump is in transmission.

Preferably, the impeller is of a hollow structure, and the impeller is provided with a closed cavity separated from the liquid containing cavity.

Preferably, the impeller comprises a main body and a plurality of blades arranged at one axial end of the main body, the blades are uniformly distributed along the circumferential direction of the main body at intervals, and the cavity is arranged on the main body.

Preferably, the body has a radial clearance with an inner wall of the pump casing.

Preferably, a liquid channel extending along the axial direction of the impeller is formed in the inner wall of the impeller, and the liquid channel is communicated with the liquid containing cavity and the outer ring chamber.

The liquid channel is a rectangular groove, and a plurality of liquid channels are arranged at intervals along the circumferential direction of the impeller.

Preferably, a flow restriction port is arranged on the pump shell between the impeller and the receiving wheel, the flow restriction port is a part with the smallest sectional area of the liquid flow channel, and the ratio of the sectional area of the flow restriction port to the sectional area of the liquid flow channel is less than 0.8.

Preferably, the liquid containing cavity is provided with an inner cavity wall with the diameter gradually reduced along the direction from the flow limiting port of the centrifugal pump to the hydraulic motor, and the reducing end of the inner cavity wall is communicated with the second channel.

Preferably, the impeller and the receiving wheel are arranged coaxially, and the minimum clearance between the impeller and the receiving wheel is 1-10 mm.

Compared with the prior art, the hydraulic centrifugal force driving device provided by the embodiment of the invention has the beneficial effects that: the centrifugal pump impeller rotates to generate motion potential energy and pressure energy of liquid for the liquid, in the prior art, only one energy is usually used for outputting the energy, the other energy is not used, and great waste exists.

The centrifugal pump can produce big pressure, by mainly by the rotational speed decision, improve the centrifugal pump, the rotational speed, just can improve output pressure, thereby the power of equipment has been improved, when equal power, can reduce the volume of equipment, installation space has been reduced, save material's quantity, this scheme makes the impeller of centrifugal pump into hollow seal structure, the metal material preparation that the cooperation density is less, can reduce the density of impeller, thereby reduce centrifugal force's influence, and can improve the intensity of impeller, it is gapped between hollow part's impeller and the shell, there is liquid between the clearance, when impeller high-speed rotation, because liquid can not be compressed, the space between impeller and the shell is difficult to change, thereby play the centering effect, more do benefit to the high-speed rotation of impeller.

There is the liquid channel between impeller and the center pin, and gapped between pump case and the impeller, form the isobaric state of intercommunication, make the impeller when high-speed rotation, do not have the pressure differential, press the impeller to the motor direction to apply axial load to the bearing, this scheme makes the impeller when very high rotational speed, also can not receive the influence because of the pressure is uneven.

Because the impeller is in high-speed state, and the speed of the liquid that just got into the impeller stifled is close to 0, if with prior art's centrifugal pump, there is not buffer space, or set up unreasonablely, then the speed of liquid is from 0 fiercely increasing to high speed, then produce stronger counter-force to the leaf of impeller, produce great vibrations simultaneously, cause great energy loss, this scheme is in holding the liquid chamber, adopt horn mouth shape structure between impeller and the entry, and the leaf of impeller is far away apart with the entry of liquid, be equipped with enough big buffer space, thereby reduce energy loss, be favorable to the high-speed rotation of impeller.

The middle part at the main shaft is established to the page wheel, and prior art establishes the one end at the main shaft with the page wheel, and this scheme is established at the middle part, and the bearing is installed at the both ends of page wheel, can let the even atress of bearing, if install in the unilateral, the bearing only is being close to the one end atress of page wheel, and this scheme enables the even atress of bearing, installs simultaneously at the middle part, can also reduce the off-centre when page wheel rotates, and more stable operation is favorable to the high-speed rotation of page wheel.

The pump shell between the impeller and the receiving wheel is provided with a flow limiting opening which is cylindrical, the rotation of the impeller in the impeller chamber is ensured on the shell and is not influenced by the receiving wheel of the outer ring chamber, if the position is too large, the liquid in the liquid containing cavity rotating at a high speed and the liquid in the outer ring chamber generate convection, so that energy loss is caused, and the high-speed rotation of the impeller is influenced.

The output power of the hydraulic motor is in direct proportion to the pressure and the displacement, and when the output power is unchanged, the smaller the working pressure is, the larger the displacement is; the greater the working pressure, the smaller the displacement, the lower the speed of the hydraulic motor, while the speed of the impeller is high. This equipment is through reasonable setting up the gearbox, through the acceleration of gear, can solve the low problem of hydraulic motor rotational speed when high-power, and the rotational speed is higher in same equipment, and in the transportation of liquid, the higher energy loss that the pressure is more is less, because pressure increases, can reduce the discharge capacity of liquid, and the liquid that exactly consumes is still less, and the liquid quantity has been few, and energy loss has also been lacked during the transportation.

The pump casing of centrifugal pump and hydraulic motor's shell design are in same equipment, and do not adopt conventional pipe connection, make the gearbox arrange in pump casing and shell, and the centrifugal pump promptly, gearbox and hydraulic motor are a whole, can occupy installation space less, because the sharing of some parts, adopts to set up the fluid passage on the shell, has saved the connecting tube of each part, has reduced installation space, greatly reduced the quantity of material.

Drawings

FIG. 1 is a schematic diagram of the hydraulic centrifugal force driving apparatus of the present invention;

FIG. 2 is a top view of the hydraulic centrifugal force driver of FIG. 1 rotated ninety degrees;

FIG. 3 is a side view of the hydraulic centrifugal force driver of FIG. 1;

FIG. 4 is a cross-sectional view A-A of the hydraulic centrifugal force driver of FIG. 2;

FIG. 5 is a cross-sectional view B-B of the hydraulic centrifugal force driver of FIG. 2;

FIG. 6 is a D-D cross-sectional view of the hydraulic centrifugal force driver of FIG. 3;

FIG. 7 is a sectional view F-F of the hydraulic centrifugal force driver of FIG. 5;

FIG. 8 is a sectional view taken along line G-G of the hydraulic centrifugal force driver of FIG. 5;

FIG. 9 is a sectional view H-H of the hydraulic centrifugal force driver of FIG. 7;

FIG. 10 is a J-J cross-sectional view of the hydraulic centrifugal force driver of FIG. 6;

FIG. 11 is a K-K cross-sectional view of the hydraulic centrifugal force driver of FIG. 6;

FIG. 12 is a sectional view L-L of the hydraulic centrifugal force driver of FIG. 6;

FIG. 13 is an N-N cross-sectional view of the hydraulic centrifugal force driver of FIG. 4;

FIG. 14 is a cross-sectional view P-P of the hydraulic centrifugal force driver of FIG. 4;

FIG. 15 is a schematic view of the construction of the impeller of the hydraulic centrifugal force driven apparatus of the present invention;

FIG. 16 is a top view of the page wheel of FIG. 15;

FIG. 17 is a side view of the page wheel of FIG. 15;

FIG. 18 is a cross-sectional view a-a of the impeller of FIG. 15;

FIG. 19 is a cross-sectional view b-b of the impeller of FIG. 15;

FIG. 20 is a cross-sectional view c-c of the impeller of FIG. 16;

FIG. 21 is a d-d cross-sectional view of the page wheel of FIG. 15;

FIG. 22 is a cross-sectional view e-e of the impeller of FIG. 17;

FIG. 23 is a schematic view of the configuration of the receiving wheel of the hydraulic centrifugal force driver of the present invention;

FIG. 24 is a top view of the receiving wheel of FIG. 23;

FIG. 25 is a cross-sectional view of a blade-receiving portion of the receiving wheel of FIG. 24;

fig. 26 is an operational schematic diagram of the hydraulic centrifugal force driving apparatus of the present application.

In the figure, 1, a centrifugal pump; 11. a pump housing; 111. an outer ring chamber; 112. a first channel 113, a second channel; 12. a main shaft; 13. a paddle wheel; 131. a main body; 132. a sheet; 133. a cavity; 134. a liquid channel; 14. an output shaft; 15. a receiving wheel; 151. receiving a blade; 2. a hydraulic motor; 21. a housing; 211. a liquid inlet; 212. a liquid outlet; 22. a rotating wheel; 23. a swing blade; 231. a blade shaft; 24. blocking the platform; 25. accommodating grooves; 26. an inner boss; 3. a gearbox; 31. a speed increasing gear set.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

A preferred embodiment of the hydraulic centrifugal force driving device of the present invention, as shown in fig. 1 to 26, comprises a centrifugal pump 1, a potential energy receiving device, a gearbox 3 and a hydraulic motor 2, wherein the gearbox 3 is in transmission connection between the centrifugal pump 1 and the hydraulic motor 2.

The centrifugal pump 1 comprises a pump shell 11, a main shaft 12 and a vane wheel 13, wherein a liquid containing cavity for containing liquid is formed in the inner cavity of the pump shell 11, the main shaft 12 is rotatably assembled on the pump shell 11, one end of the main shaft 12 extends to the outer side of the pump shell 11, and the main shaft 12 is connected with an external motor and drives the main shaft 12 to rotate through the motor. The impeller 13 is assembled with the main shaft 12 in a rotation stopping way, the impeller 13 is installed in the middle of the main shaft 12, bearings are arranged at two ends of the impeller 13, and the impeller 13 is used for rotating along with the main shaft 12 and driving liquid in the liquid containing cavity to flow. The output shaft 14 and the impeller 13 are in indirect transmission connection through a potential energy receiving device by taking liquid as a medium, the output shaft 14 is an output structure of the centrifugal pump 1 and is used for outputting power outwards, and the output shaft 14 and the main shaft 12 are arranged in parallel.

The impeller 13 includes a main body 131 and a blade 132 disposed at one axial end of the main body 131, the blade 132 is disposed at one end of the main body 131 close to the transmission case 3, and the plurality of blades 132 are uniformly distributed along the circumference of the main body 131. The main body 131 is assembled with the main shaft 12 through a key slot structure, the main body 131 is of a hollow structure, the main body 131 is provided with a closed cavity 133 separated from the liquid containing cavity, and air, inert gas or vacuum can be filled in the cavity 133. The impeller 13 is made of metal materials with lower density such as aluminum alloy, the density of the impeller 13 with the cavity 133 is lower than that of liquid in the liquid containing cavity, and the impeller 13 can float on the liquid when placed in the liquid.

The main body 131 of the impeller 13 is provided with a central hole, the inner diameter of the central hole is equal to the outer diameter of the main shaft 12, an axially extending liquid channel 134 is arranged between the main body 131 of the impeller 13 and the main shaft 12, the liquid channel 134 is arranged on the hole wall of the central hole of the impeller 13, and the liquid channels 134 are arranged at intervals along the circumferential direction of the impeller 13. The fluid passage 134 is a rectangular groove, the fluid passage 134 is used for allowing fluid to enter between the impeller 13 and the pump housing 11, when the impeller 13 rotates, the fluid enters the radial interval between the main body 131 and the main shaft 12 through the fluid passage 134 and flows into the outer ring chamber 111 under the action of centrifugal force.

The body 131 of the impeller 13 and the inner wall of the pump shell 11 have a radial gap, when the impeller 13 rotates, the gap is filled with liquid which rotates synchronously with the impeller 13 at high speed, if the impeller 13 vibrates or is eccentric, the gap distance between the impeller 13 and the pump shell 11 changes, the pump shell 11 is fixed, and the impeller 13 is difficult to vibrate or eccentrically change when rotating at high speed, thereby achieving the centering effect.

The potential energy receiving device is connected between a main shaft 12 and an output shaft 14 of the centrifugal pump 1 in a transmission mode, the potential energy receiving device comprises an outer ring chamber 111 and a receiving wheel 15, the outer ring chamber 111 is communicated with the liquid containing cavity, the communication port is a flow limiting port and is cylindrical, the sectional area (the circumference is multiplied by the height) of the cylindrical surface of the potential energy receiving device is the minimum sectional area of all liquid loops, the ratio of the sectional area of the flow limiting port to the sectional area of a liquid runner is smaller than 0.8, the vane wheel and the receiving wheel are arranged coaxially, and the minimum gap between the vane wheel 13 and the receiving wheel 15 is 2 mm. The flow limiting opening is the position with the minimum sectional area of the liquid flow channel, the purpose is to form the liquid of the export in a high-speed state, like watering with a water pipe in usual, the extrusion of the water pipe export is little, the water can be sprayed farther, the flow limiting opening is made to be the minimum in the liquid channel in the same way, the liquid of the export can flow out at a high speed, and the motion potential energy of the liquid can be better received by the receiving wheel 15.

The outer ring chamber 111 is arranged on the pump shell 11 and is coaxial with the main shaft 12, the impeller 13 drives the liquid to rotate at a high speed when rotating, when high-pressure liquid passes through the curved channel between the receiving blades 151, the high-speed flowing liquid has inertia, the direction of the liquid needs to be changed when the liquid enters the curved channel, and power is transmitted to the receiving blades 151 to push the channel to enter the outer ring chamber 111 after the receiving blades 151 rotate.

The receiving wheel 15 is disposed in the outer ring chamber 111, the receiving wheel 15 is rotatably fitted in the outer ring chamber 111 by a bearing, and the receiving wheel 15 is disposed coaxially with the main shaft 12. The receiving wheel 15 is of an annular structure, the inner wall surface of the receiving wheel 15 is fixedly connected with the outer ring of the bearing, a gear is fixedly connected to the receiving wheel 15, the inner ring of the gear is fixedly connected with the outer ring of the bearing, the inner ring of the bearing is fixedly connected to the inner wall of the outer ring chamber, the gear is meshed with the gear on the output shaft 14 and outputs kinetic energy outwards, and the outer peripheral surface of the receiving wheel 15 is in meshed transmission connection with the output shaft 14 through the gear. When the receiving wheel 15 rotates, the gear can drive the output shaft 14 to rotate, and the rotational kinetic energy is output outwards.

A plurality of receiving blades 151 are arranged on the side surface of the receiving wheel 15, the receiving blades 151 are uniformly distributed along the circumferential direction of the receiving wheel 15 at intervals, the receiving blades 151 are in a fish scale shape, an interval is arranged between every two adjacent receiving blades 151 so as to allow liquid to flow, and the interval is in a parabolic shape. The sum of the sectional areas of the liquid flow paths between the receiving blades 151 is larger than the section at the outlet of the liquid containing chamber, which has a ring shape without an obstacle in the middle. When the impeller 13 rotates, the liquid is driven to rotate at a high speed and enters the outer ring chamber 111, the liquid flows from the space between two adjacent receiving blades 151, the flow direction of the liquid is changed by the receiving blades 151 when the liquid contacts the receiving blades 151, meanwhile, the liquid applies acting force to the receiving blades 151 to drive the receiving blades 151 to rotate around the main shaft 12, the receiving blades 151 drive the receiving wheel 15 to rotate, further, the output shaft 14 is driven to rotate, and the kinetic energy of the liquid is transmitted to the output shaft 14 to do work outwards.

The hydraulic motor 2 comprises a shell 21, a rotating wheel 22 and a swinging blade 23, wherein the rotating wheel 22 is rotatably assembled in the shell 21, the swinging blade 23 is rotatably assembled on the rotating wheel 22, a baffle 24 used for stopping the swinging blade 23 is arranged on the rotating wheel 22, liquid can drive the swinging blade 23 to swing, and the rotating wheel 22 is driven to rotate by the baffle 24 when the swinging blade 23 rotates. The swinging blade 23 is provided with a notch for installing a sealing rubber strip, so that a good sealing effect is achieved. The rotating circle center of the swing blade 23 is hollow and is used for installing the blade shaft 231, and the blade shaft 231 penetrates through the swing blade 23 and forms a hinge structure with the rotating wheel 22.

The rotating wheel 22 is further provided with accommodating grooves 25 for accommodating the swing blades 23, and the accommodating grooves 25 and the blocking platforms 24 are arranged on two sides of the swing center of the swing blades 23. A spring elastically fitted to the swing blade 23 is further disposed on the rotating wheel 22, and the spring applies an elastic force to the swing blade 23 to swing to the outside of the receiving groove 25, so that the swing blade 23 is in retaining engagement with the abutment 24. An inner boss 26 in clearance fit with the rotating wheel 22 is further formed on the inner side of the outer shell 21, when the rotating wheel 22 rotates, the swinging blade 23 rotates to the position of the inner boss 26, the inner boss 26 is blocked with the swinging blade 23, the swinging blade 23 rotates in the accommodating groove 25 in the reverse direction, after the swinging blade 23 passes over the position of the inner boss 26, the swinging blade 23 rotates out of the accommodating groove 25 under the action of a spring and drives the rotating wheel 22 to rotate through the blocking boss 24, and therefore pressure energy of liquid is converted into rotation energy of the rotating wheel 22.

The inner bosses 26 are two in total, and the two inner bosses 26 are arranged axisymmetrically with respect to the rotary cam 22. The hydraulic motor 2 is provided with two liquid inlets 211 and two liquid outlets 212 on two circumferential sides of the inner bosses 26, that is, the two liquid inlets 211 and the two liquid outlets 212 are respectively arranged alternately along the circumferential direction of the outer shell 21, the direction from the liquid inlet 211 between the two inner bosses 26 to the liquid outlet 212 is the same as the rotation direction of the rotating wheel 22, that is, the liquid enters from the liquid inlet 211 and drives the swinging blades 23 to rotate, the swinging blades 23 are circumferentially stopped by the inner bosses 26 after rotating to the inner bosses 26 and reversely rotate into the accommodating groove 25, and the liquid enters the liquid outlets 212.

The pump casing 11 of the centrifugal pump 1 is provided with a first channel 112 and a second channel 113, one end of the first channel 112 is communicated with the outer ring chamber 111, the other end is communicated with the liquid inlet 211, one end of the second channel 113 is communicated with the liquid containing cavity, the other end is communicated with the liquid outlet 212, the liquid pressure of the first channel 112 is greater than that of the second channel 113, namely, the first channel 112 is a high-pressure channel, and the second channel 113 is a low-pressure channel. When the impeller 13 rotates, the liquid is driven to enter the outer ring chamber 111, the liquid enters the first channel 112 after the outer ring chamber 111 drives the receiving wheel 15 to rotate, the liquid enters the hydraulic motor 2 through the liquid inlet 211, the liquid drives the swing blades 23 to rotate and drives the rotating wheel 22 to rotate towards the direction of the liquid outlet 212, after the swing blades 23 cross the inner boss 26, the liquid flows out of the hydraulic motor 2 through the liquid outlet 212, and then enters the liquid accommodating cavity after passing through the second channel 113, and circular flow is formed.

The liquid containing cavity is provided with an inner cavity wall with the inner diameter gradually reduced along the direction from the flow limiting port of the centrifugal pump to the hydraulic motor, the section of the inner cavity wall is in a horn-shaped structure, the reducing end of the horn-shaped inner cavity wall faces the hydraulic motor 2 and is communicated with the second channel 113, liquid enters the reducing end of the inner wall from the outflow port of the second channel 113 and then enters the liquid containing cavity through the horn-shaped inner cavity wall, and the horn-shaped inner cavity wall can buffer the liquid so that the liquid can be uniformly accelerated.

The gearbox 3 is arranged between the centrifugal pump 1 and the hydraulic motor 2, the output end of the gearbox 3 is in transmission connection with the main shaft 12 of the centrifugal pump 1, the input end of the gearbox 3 is in transmission connection with the rotating wheel 22 of the hydraulic motor 2, the input end of the gearbox 3 is at a low rotating speed, and the output end of the gearbox 3 is at a high rotating speed so as to accelerate the main shaft 12 of the centrifugal pump 1. A group of speed-up gear sets 31 are arranged in the gearbox 3, each speed-up gear set 31 comprises seven speed-up gears which are meshed in sequence, the rotating wheel 22 of the hydraulic motor 2 is meshed with the input gear of the speed-up gear set 31, the main shaft 12 of the centrifugal pump 1 is meshed with the output gear of the speed-up gear set 31, and the rotating direction of the main shaft 12 is consistent with the meshing rear direction of the output gear of the speed-up gear set 31; in other embodiments, the number of ratio gears may be more or less than seven. The speed increasing gear set 31 is used for increasing the rotating speed, the rotation of the rotating wheel 22 of the hydraulic motor 2 is transmitted to the main shaft 12 after the speed increasing effect of the speed increasing gear set 31, the rotating speed of the main shaft 12 can be greatly increased, and therefore the kinetic energy of the hydraulic motor 2 is converted into the kinetic energy of the main shaft 12, namely the pressure energy of liquid is converted into the kinetic energy of the main shaft 12 through the hydraulic motor 2, the energy conversion efficiency is improved, and energy is saved.

The working process of the invention is as follows: the motor drives the main shaft 12 of the centrifugal pump 1 to rotate, the main shaft 12 drives the impeller 13 to rotate when rotating, the vane 132 of the impeller 13 drives the liquid to rotate at a high speed, the liquid rotating at the high speed has pressure energy and potential energy, and the central area of the impeller 13 is at a low pressure, and the outer edge area of the impeller 13 is at a high pressure; high-pressure liquid enters the outer ring chamber 111, the liquid flows at a high speed and drives the receiving wheel 15 to rotate through the receiving blades 151, the receiving wheel 15 drives the output shaft 14 to rotate, and kinetic energy of the liquid is transmitted to the output shaft 14; meanwhile, high-pressure liquid enters the first channel 112 from the outer ring chamber 111 and enters the hydraulic motor 2 through the liquid inlet 211 of the hydraulic motor 2, the liquid pushes the rotating wheel 22 to rotate through the swinging blades 23, the pressure energy of the liquid is converted into the rotating energy of the rotating wheel 22, and the liquid enters the second channel 113 through the liquid outlet 212 and returns to the liquid containing cavity to form circular flow; when the rotating wheel 22 rotates, the speed increasing gear set 31 of the gearbox 3 is driven to rotate, the main shaft 12 of the centrifugal pump 1 is driven to rotate after the speed of the speed increasing gear set 31 is increased, the rotating speed of the main shaft 12 is increased, namely, the potential energy of the liquid is converted into the kinetic energy of the main shaft 12 through the hydraulic motor 2 and the gearbox 3, and the kinetic energy is converged with the power input by the motor and enters the next working cycle.

As shown in fig. 26, the power-using device gives a command to a control system (main controller), the control system receives a command signal, and gives a command to a first power supply system after analysis, the first power supply system converts the electricity of the storage battery into a power supply required by the motor, and if the first power supply system is an alternating current motor, the first power supply system can convert the electricity of the storage battery into a voltage and a frequency required by the alternating current motor, because the rotating speed of the alternating current motor depends on the frequency of the alternating current, and the frequency is changed to adjust the speed according to the requirement of the power-using device; if the motor is a DC motor, the electricity of the storage battery is converted into the voltage required by the DC motor, and the motor is provided with a current direction switching device of the DC motor and a motor rotating speed sensor to regulate the current intensity and the voltage according to the requirement of power using equipment so as to regulate the speed. The second power supply system converts the electricity generated by the generator into alternating current used by the commercial power, the voltage and the frequency of the alternating current are the same as those of the commercial power, and the charger converts a power supply used by the commercial power into direct current required by the storage battery.

When the power utilization equipment sends a starting-up instruction to the control system, the control system sends an instruction to the second power supply system, the electricity of the storage battery is converted into a power supply required by the motor to supply power to the motor, the motor rotates after being electrified to drive the main shaft and the vane wheel to rotate, the vane wheel drives the liquid to rotate, the rotating liquid generates kinetic potential energy and high-pressure kinetic energy, the high-pressure kinetic energy pushes the hydraulic motor to work, meanwhile, the liquid flows, and the liquid with the kinetic potential energy pushes the receiving wheel to rotate, thereby driving the output shaft to rotate, the output shaft transmits the power to the power utilization equipment, simultaneously, the output shaft drives the generator to rotate, the generator generates voltage and current due to the rotation, at this time, because the power using equipment has large demand on power, the control system sets the output current of the charger to be 0, the generator consumes less kinetic energy from the power output shaft as far as possible, and the electric energy of the motor is completely sourced from the storage battery. The storage battery and the generator are configured to be used on mobile equipment or used in places without commercial power, and if the mobile equipment is provided with the commercial power, the storage battery and the generator can be omitted, directly connected with the commercial power, and can also be reserved.

When the power demand of the power using equipment is met, if the electric energy input of the motor is unchanged, the power of the hydraulic motor is converged with the power of the motor, the power output power is increased, at the moment, the control system can send an instruction to the charger to increase the output current, and meanwhile, according to the comprehensive analysis of the instruction information of the motor speed sensor, the battery capacity sensor and the power using equipment, the adjustment of the strength of the output current of the charger is made, and the output current can be used for charging the battery and supplying power to the first power supply system.

It should be noted here that the kinetic energy of the liquid after passing through the hydraulic motor to increase the rotational energy is larger than the energy output by the electric motor, that is, when the kinetic energy input by the outer electric motor is equal, the kinetic energy output by the hydraulic motor is unequal after being combined with the input energy of the electric motor. In this example, if the hydraulic motor is not installed, the liquid enters the low-pressure channel directly from the high-pressure channel, and there is no energy supplement from the hydraulic motor, the kinetic energy input of the external electric motor and the kinetic potential energy generated by the centrifugal pump are equal when the energy loss is not counted, according to the related documents, the acceleration of the centrifugal pump to the liquid is from 0 to high speed, the consumed kinetic energy is equal to the generated kinetic energy, that is, the kinetic energy generated by the liquid when the liquid is decelerated from the high speed state to 0. The scheme is that the pressure energy generated by the centrifugal pump is converted into the rotational energy by the hydraulic motor and then is output to the main shaft of the centrifugal pump, and the rotational energy is combined with the kinetic energy input by the external electric motor, so that the output kinetic potential energy is far larger than the situation without the hydraulic motor.

When the hydraulic motor rotates, the liquid flow rate is changed, but if the flow rate is reduced, the requirement of the centrifugal pump on kinetic energy is reduced under the same condition of equal rotating speed, when the flow rate is 0, the kinetic energy consumption is 0 when the centrifugal pump does not count the energy loss, and the external output energy of the output shaft is 0, so that the utilization of the pressure energy of the hydraulic motor does not influence the energy output rate of the motion potential energy generated by the centrifugal pump on the output shaft.

The energy is analyzed, according to the law of conservation of energy, assuming that the energy output by the motor outside is in equal relation with the sum of the motion potential energy and the pressure energy of the output energy, and assuming that the energy input of the motor is A, the motion potential energy output is B, and the pressure energy output is C, then the equation is: as can be seen from the above equation, when the output kinetic energy B increases, the output pressure energy C decreases, and vice versa, the output pressure energy C increases.

However, the output of the motion potential energy B in the equipment is not influenced by the output of the pressure energy, the energy output in the hydraulic motor is not influenced by the output of the motion potential energy B, the motion potential energy B rotates by the liquid potential energy received by the receiving wheel to output energy to the outside, and the rotation speed of the receiving wheel, the stress and whether the receiving wheel rotates to do work to the outside cannot obviously influence the hydraulic motor. Because the cross-section of the liquid passage between the receiving blades in the receiving wheel is larger than the cross-section of the flow restriction in the impeller chamber and the outer ring chamber. Therefore, the flow rate is controlled by the size of the flow-limiting opening, and the receiving wheel rotates or not, and the rotating speed does not change the size of the section, so that the liquid flow rate is not obviously changed.

The hydraulic motor kinetic energy output is also determined by the pressure, the pressure at the input port of the hydraulic motor depends on the rotating speed of the centrifugal pump, the rotating speed is high, the pressure is high, the rotating speed is low, the pressure is low, and the receiving wheel rotates or not, the rotating speed cannot obviously change the pressure at the inlet of the hydraulic motor, so the output of the potential energy cannot obviously influence the output of the pressure energy.

The above is an analysis of the change in potential energy magnitude, where the pressure energy is analyzed. The rotation speed of the hydraulic motor can affect the flow of the liquid, and the flow affects the potential energy output of the liquid and the energy input of the centrifugal pump. When the rotating speed of the centrifugal pump is constant, the higher the rotating speed of the liquid motor is, the larger the kinetic energy output of liquid potential energy is, the larger the kinetic energy consumption of the centrifugal pump is, and the smaller the kinetic energy consumption of the centrifugal pump is, otherwise, the lower the rotating speed of the hydraulic motor is, and only the flow can be controlled, which is the same as a liquid flow switch. The hydraulic motor in the device has little influence on the input of the motor kinetic energy and the output rate of the liquid potential energy. If the rotating speed in the hydraulic motor changes, the kinetic energy input of the electric motor is constant, when the rotating speed of the hydraulic motor is reduced, the liquid flow is reduced, and the rotating speed of the centrifugal pump is increased after the liquid flow entering the hydraulic motor is reduced because the input power of the centrifugal pump is unchanged, while the rotating speed is increased, the flow is reduced, and the output of the liquid potential energy of the centrifugal pump is not changed. The hydraulic motor in the device has little influence on the input of the motor kinetic energy and the output rate of the liquid potential energy.

The centrifugal force generated by the liquid is determined by the speed, the mass and the radius, when the mass and the radius are not changed, the centrifugal force calculator calculates that the centrifugal force generated at different speeds is an increasing change value and is not a linear function relation, and the centrifugal pump accelerates the liquid, and when the energy is not counted, the energy consumed by acceleration is a linear function relation, for example: under the same radius and other same conditions, the energy consumed by accelerating 1 kg of liquid from 500 m/s to 600 m/s and accelerating 1 kg of liquid from 600 m/s to 700 m/s are equal, but when calculating the centrifugal force, the centrifugal force increased by accelerating the liquid from 500 m/s to 600 m/s and from 600 m/s to 700 m/s is unequal, and the latter is greater than the former, so the original assumption that the relationship between the energy output by the external motor energy and the sum of the output energy kinetic potential energy and the pressure energy cannot be established because the pressure C is a non-linear function variable.

In the equipment, because the energy input by the external motor and the energy output by the external motor can not form an equality relation, the output rate of the pressure energy is increased along with the increase of the rotating speed, the generated pressure energy and the output of the movement potential energy of the liquid can not influence each other, when the speed reaches a certain value, the output energy (the sum of the pressure energy and the movement potential energy of the liquid) is possibly greater than the input kinetic energy of the motor, thereby knowing whether the equipment can output the energy to the outside only by charging the self generator without connecting an external power supply, and actually realizing the energy, because the energy conversion needs to consume the energy and has a great relation with the conditions of material selection, processing precision and the like, the energy-saving effect which can be achieved also needs to be known in the actual application if not, the purpose of this scheme is more energy-conserving than prior art, in the motion potential energy and the pressure energy full use that produce when accelerating liquid with the centrifugal pump, the maximize energy can be saved.

To sum up, the embodiment of the present invention provides a hydraulic centrifugal force driving device, wherein a first channel on a pump case of a centrifugal pump communicates a liquid containing cavity with a liquid inlet of a hydraulic motor, and a second channel communicates the liquid containing cavity with a liquid outlet of the hydraulic motor, when a main shaft of the centrifugal pump rotates, liquid in the liquid containing cavity enters the hydraulic motor from the liquid containing cavity through the first channel, and liquid drives a rotating wheel of the hydraulic motor to rotate and then flows back to the liquid containing cavity through the second channel, so as to form liquid circulation; the rotating kinetic energy of the rotating wheel is accelerated by the gearbox and then transmitted to the main shaft of the centrifugal pump, so that the main shaft is driven to rotate in an accelerated mode, namely, the potential energy of the liquid is transmitted to the main shaft through the hydraulic motor and the gearbox, the pressure energy is converted into the motion potential energy of the liquid, the motion potential energy of the liquid is transmitted to the output shaft through the receiving wheel to do work outwards, the energy conversion efficiency is improved, and energy is saved.

The above description is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various modifications and substitutions without departing from the technical principle of the present invention, such as replacing the hydraulic motor with a plunger type hydraulic motor or a gear motor; the centrifugal pump is changed into a centrifugal pump of other types, or the number of the main bodies in the embodiment is 2, the centrifugal pump is respectively arranged at two sides of the vane, the liquid channel is arranged at the center of the main shaft, the hollow shaft is used as the liquid channel, one end of the motor in the direction is closed, a hole is formed in the vane, the length of the vane from the circle center to the excircle direction is gradually increased, the same effect can be achieved, and the improvement and the replacement are also regarded as the protection scope of the invention.

Claims

1. A hydraulic centrifugal force driving device is characterized by comprising a centrifugal pump, a potential energy receiving device, a hydraulic motor and a gearbox, wherein the centrifugal pump comprises a pump shell, a main shaft rotationally assembled on the pump shell, a vane wheel rotationally assembled on the main shaft and an output shaft rotationally assembled on the pump shell, a liquid containing cavity used for containing liquid is arranged in the pump shell, the output shaft and the vane wheel are in transmission connection through the potential energy receiving device, the potential energy receiving device comprises an outer ring chamber communicated with the liquid containing cavity, a receiving wheel is rotationally assembled in the outer ring chamber and is in transmission connection with the output shaft, receiving blades are arranged on the receiving wheel, the hydraulic motor comprises a shell and a rotating wheel rotationally assembled in the shell, a first channel communicated with a liquid inlet of the hydraulic motor and the outer ring chamber is formed in the pump shell, The centrifugal pump is characterized by comprising a liquid containing cavity, a first channel, a second channel, a main shaft, a transmission case, a rotating wheel, a transmission case and a transmission device, wherein the first channel is communicated with the liquid containing cavity and a liquid outlet of the hydraulic motor, the main shaft of the centrifugal pump is in transmission.

2. The hydraulic centrifugal force driver according to claim 1, wherein the impeller is a hollow structure having a closed cavity separated from the liquid containing chamber.

3. The hydraulic centrifugal force driving device according to claim 2, wherein the impeller comprises a main body and a plurality of blades arranged at one axial end of the main body, the plurality of blades are uniformly distributed along the circumferential direction of the main body, and the cavity is arranged on the main body.

4. The hydraulic centrifugal force driver according to claim 3, wherein there is a radial clearance between the body and an inner wall of the pump casing.

5. The hydraulic centrifugal force driving device according to any one of claims 1 to 4, wherein a liquid channel extending in the axial direction of the impeller is formed on the inner wall of the impeller, and the liquid channel communicates the liquid containing chamber with the outer ring chamber.

6. The hydraulic centrifugal force driving device according to claim 5, wherein the liquid passage is a rectangular groove, and a plurality of liquid passages are arranged at intervals in a circumferential direction of the impeller.

7. The hydraulic centrifugal force driving device according to any one of claims 1 to 4, wherein a restriction port is provided on the pump casing between the impeller and the receiving wheel, the restriction port is a portion where the sectional area of the liquid flow passage is smallest, and the ratio of the sectional area of the restriction port to the sectional area of the liquid flow passage is less than 0.8.

8. The hydraulic centrifugal force driver as recited in claim 7 wherein the fluid-containing chamber has an inner chamber wall of progressively decreasing diameter in a direction from the restriction of the centrifugal pump to the hydraulic motor, the reduced end of the inner chamber wall communicating with the second passage.

9. The hydraulic centrifugal force drive according to any one of claims 1-4, wherein the impeller is arranged coaxially with the receiving wheel, the minimum clearance between the impeller and the receiving wheel being 1-10 mm.