CN213870994U - Hydraulic centrifugal force transmission - Google Patents

Abstract

The utility model relates to the technical field of transmissions, a hydraulic centrifugal force transmission is disclosed, including centrifugal pump, potential energy receiving arrangement, hydraulic motor and output shaft, the centrifugal pump includes pump case, main shaft and impeller, has the liquid holding chamber in the pump case, potential energy receiving arrangement includes the outer ring room, the indoor rotation of outer ring is equipped with the receiving wheel, the receiving wheel is connected with the output shaft transmission, the last receiving blade that has arranged of receiving wheel, hydraulic motor includes shell and rotating wheel, the rotating wheel is connected with the output shaft transmission; a first channel and a second channel are formed in the pump shell, and a flow control switch is arranged on the first channel. When the vehicle is started at a low speed, the flow control switch controls the liquid flow to increase, the torque of the hydraulic motor is large when the hydraulic motor rotates at the low speed, and the characteristic of the hydraulic motor is reasonably utilized to meet the requirement of high torque output of the vehicle; when the vehicle runs at a high speed, the flow control switch controls the liquid flow to increase, the power output by the hydraulic motor is weakened or disappeared, and the centrifugal pump drives the output shaft to rotate through the potential energy receiving device, so that the energy is saved.

Description

Hydraulic centrifugal force transmission

Technical Field

The utility model relates to a derailleur technical field especially relates to a hydraulic pressure centrifugal force derailleur.

Background

The speed changer is a device for changing the output power of power, the centrifugal force speed changer accelerates liquid by a vane wheel of the centrifugal pump, the liquid moving at high speed is transmitted to an output shaft by a potential energy receiving vane, and the output shaft does work outwards.

However, when the output shaft of the device rotates at a high speed, the effect is better, but at a low speed, the torque is not obviously increased, the speed is low, the output power is reduced, in order to maintain the same torque, the rotating speed of the centrifugal pump cannot be reduced, the flow rate of the liquid is not changed greatly, the kinetic energy of the input kinetic energy cannot be reduced, and therefore, larger energy loss exists, if the kinetic energy of the input kinetic energy is reduced, the rotating speed of the centrifugal pump is reduced, and the torque of the output shaft is reduced, because the technology only utilizes the kinetic potential energy generated by the liquid by the centrifugal pump, and the pressure energy is not utilized.

SUMMERY OF THE UTILITY MODEL

The utility model aims at: the hydraulic centrifugal force transmission is characterized in that the kinetic potential energy and the pressure energy generated by a centrifugal pump to liquid are simultaneously utilized so as to meet the power requirements of vehicles in different speed states.

In order to achieve the above object, the utility model provides a hydraulic pressure centrifugal force derailleur, including centrifugal pump, potential energy receiving arrangement, hydraulic motor and output shaft, the centrifugal pump includes pump case, the main shaft of rotation assembly on the pump case and the impeller of splines assembly on the main shaft, the output shaft rotates the assembly on the pump case, have the appearance liquid chamber that is used for holding liquid in the pump case, the output shaft with pass through between the impeller potential energy receiving arrangement transmission connection, potential energy receiving arrangement includes with hold the outer loop room of liquid chamber intercommunication, the indoor rotation of outer loop is equipped with the receiving wheel, the receiving wheel with output shaft transmission connection, the receiving wheel is arranged with receiving blade, hydraulic motor includes the shell and rotates the rotating wheel of assembly in the shell, the rotating wheel with output shaft transmission connection; the pump shell is provided with a first channel for communicating the liquid containing cavity with a liquid inlet of the hydraulic motor and a second channel for communicating the liquid containing cavity with a liquid outlet of the hydraulic motor, and the first channel is provided with a flow control switch.

Preferably, a check valve for one-way flow of liquid to the hydraulic motor is further arranged on the first passage.

Preferably, the first channel and the second channel are alternately arranged in two along the circumferential direction of the pump shell, and the flow control switch is arranged on each first channel.

Preferably, the impeller is of a hollow structure, and the impeller is provided with a 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, the inner wall of the impeller is provided with a liquid channel extending along the axial direction of the impeller.

Preferably, the first passage communicates with the outer annular chamber.

Preferably, a receiving wheel coaxial with the main shaft is arranged in the outer ring chamber, the receiving wheel is in meshing transmission with the output shaft, and receiving blades are arranged on the receiving wheel.

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

Preferably, the hydraulic motor has at least two liquid inlets and two liquid outlets, and the liquid inlets and the liquid outlets are alternately arranged along the circumferential direction of the housing.

The embodiment of the utility model provides a hydraulic pressure centrifugal force derailleur compares with prior art, and its beneficial effect lies in: a first channel on a pump shell of the centrifugal pump is communicated with a liquid containing cavity and a liquid inlet of the hydraulic motor, and a second channel is communicated with the liquid containing cavity and a liquid outlet of the hydraulic motor; when the vehicle is started at a low speed, the flow control switch controls the flow of liquid to be gradually increased, the liquid pushes the rotating wheel of the hydraulic motor to rotate and drives the output shaft to rotate, and the torque is large when the hydraulic motor rotates at the low speed due to the low rotating speed of the hydraulic motor, so that the requirement of high torque output of the vehicle is met by reasonably utilizing the characteristics of the hydraulic motor; when the vehicle runs at a high speed, the flow control switch controls the flow of the liquid to increase, when the rotating speed of the output shaft reaches a certain value, the output power of the hydraulic motor is gradually weakened or disappeared due to the fact that the rotating speed of the output shaft is too high, the main shaft drives the liquid to move at a high speed through the impeller, the liquid moving at the high speed drives the receiving wheel to rotate, the receiving wheel drives the output shaft to rotate, the output of the receiving wheel is high-speed, the requirement of the vehicle or other equipment for high-speed operation is met, the motion potential energy and the pressure energy generated by the centrifugal pump to the liquid are simultaneously utilized, when the rotating speed of the main shaft is 0, when the output shaft keeps the same large torque, the power requirement on the centrifugal pump is close to 0, therefore, speed change is well completed, and energy is saved.

Drawings

Fig. 1 is a schematic structural view of a hydraulic centrifugal force transmission according to the present invention;

FIG. 2 is a cross-sectional view of the hydraulic centrifugal force transmission of the present invention at a first channel;

FIG. 3 is a cross-sectional view of the hydraulic centrifugal force transmission of the present invention at a second passage;

FIG. 4 is a cross-sectional view of the hydraulic centrifugal force transmission of FIG. 2 at 1-1;

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

FIG. 6 is a cross-sectional view of the hydraulic centrifugal force transmission of FIG. 2 at 3-3;

FIG. 7 is a cross-sectional view of the hydraulic centrifugal force transmission of FIG. 2 at 4-4;

FIG. 8 is a cross-sectional view of the hydraulic centrifugal force transmission of FIG. 2 at 5-5;

FIG. 9 is a cross-sectional view of the hydraulic centrifugal force transmission of FIG. 2 at 6-6;

FIG. 10 is a schematic structural view of a vane wheel of the hydraulic centrifugal force transmission of the present invention;

FIG. 11 is a top view of the page wheel of FIG. 10;

FIG. 12 is a side view of the page wheel of FIG. 10;

FIG. 13 is a cross-sectional view a-a of the impeller of FIG. 10;

FIG. 14 is a cross-sectional view b-b of the impeller of FIG. 10;

FIG. 15 is a cross-sectional view c-c of the impeller of FIG. 11;

FIG. 16 is a cross-sectional view d-d of the page wheel of FIG. 10;

FIG. 17 is a cross-sectional view e-e of the impeller of FIG. 12;

fig. 18 is a schematic structural view of a receiving wheel of the hydraulic centrifugal force transmission of the present invention;

FIG. 19 is a top view of the receiving wheel of FIG. 18;

fig. 20 is a cross-sectional view of the receiving wheel of fig. 19.

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; 16. a receiving wheel gear; 2. a hydraulic motor; 21. a housing; 211. a liquid inlet; 212. a liquid outlet; 22. a rotating wheel; 221. an output gear; 222. fixing a gear; 23. a rotor blade; 231. a blade gear; 24. a rotor; 241. accommodating grooves; 25. a connecting gear; 26. an inner boss; 3. a flow control switch; 4. a one-way valve.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to 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.

The preferred embodiment of a hydraulic centrifugal force transmission of the present invention, as shown in fig. 1 to 20, includes a centrifugal pump 1, a potential energy receiving device, a hydraulic motor 2, and an output shaft 14.

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 used for being connected with an external motor or other driving devices and driving the main shaft 12 to rotate through the motor. The impeller 13 is assembled with the main shaft 12 in a rotation stopping way, and the impeller 13 is used for rotating along with the main shaft 12 and driving the liquid in the liquid containing cavity to flow. The output shaft 14 and the impeller 13 are in indirect transmission connection through a receiving wheel 15 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 is arranged in parallel with the main shaft 12.

The impeller 13 includes a main body 131 and a plurality of blades 132 disposed at one axial end of the main body 131, the blades 132 are disposed at one end of the main body 131 close to the hydraulic motor 2, and the plurality of blades 132 are uniformly spaced along the circumferential direction of the main body 131. The main body 131 is assembled with the main shaft 12 through a key slot structure in a rotation stopping manner, the main body 131 is of a hollow structure, the main body 131 is provided with a 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 smaller density, such as aluminum alloy, and the density of the impeller 13 with the cavity 133 is smaller 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 liquid channel 134 is a rectangular groove, the liquid channel 134 is communicated with the liquid channel 134 for liquid to enter between the vane wheel 13 and the pump shell 11, when the vane wheel 13 rotates, the liquid enters the radial interval between the main body 131 and the main shaft 12 through the liquid channel 134 and flows into the outer ring chamber 111 under the action of centrifugal force.

A radial gap is formed between the body 131 of the vane wheel 13 and the inner wall of the pump shell 11, when the vane wheel 13 rotates at a high speed, high pressure exists in liquid in the gap, a group of force towards the circle center direction is generated on the outer cylindrical surface of the vane wheel 13, and the force and the centrifugal force generated by the vane wheel 13 when the vane wheel rotates at the high speed are mutually offset, so that energy loss generated by overlarge centrifugal force when the vane wheel rotates at the high speed is reduced. When the impeller 13 rotates, the gap is filled with liquid which rotates synchronously with the impeller 13 at a 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 a high speed, so that the centering effect is achieved.

The potential energy receiving device is in transmission connection between a main shaft 12 and an output shaft 14 of the centrifugal pump 1 and comprises an outer ring chamber 111, a receiving wheel 15 and a receiving wheel gear 16, the outer ring chamber 111 is communicated with the liquid containing cavity, the outer ring chamber 111 is arranged on the pump shell 11 and is coaxially arranged with the main shaft 12, the impeller 13 drives liquid to rotate at a high speed when rotating, and high-pressure liquid enters the outer ring chamber 111 through a channel.

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, and the outer peripheral surface of the receiving wheel 15 is in meshing transmission connection with the output shaft 14 through a 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, a bolt is arranged in the middle of each receiving blade 151 and connected to the receiving wheel gear 16, 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 through, 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 rotating blade 23, wherein the rotating wheel 22 is rotatably assembled in the shell 21, an output gear 221 is assembled at one end, away from the centrifugal pump 1, of the rotating wheel 22 in a rotation stopping manner, the output gear 221 is meshed with a transmission gear on the output shaft 14, and when the rotating wheel 22 rotates, the output shaft 14 can be driven to rotate through the output gear 221 and the transmission gear to output power outwards. The hydraulic motor has low rotation speed and high torque during low speed rotation, so that the output power is high, and the characteristic of the hydraulic motor can be reasonably utilized to meet the requirement of high torque output of the vehicle. The rotating blade 23 is provided with a notch for installing a sealing rubber strip, so that a good sealing effect is achieved.

The rotating blades 23 are rotatably assembled on the rotating wheel 22, the rotating wheel 22 is fixedly assembled with the rotor 24, a plurality of blade gears 231 are uniformly distributed on the rotor 24 at intervals along the circumferential direction of the rotor, and the rotating blades 23 are fixedly connected with the blade gears 231 in a one-to-one correspondence manner. The fixed gear 222 is fixedly arranged on the shell 21, the blade gears 231 and the fixed gear 222 are in meshing transmission connection through connecting gears 25, the number of the connecting gears 25 is the same as that of the fixed gear 222, and each connecting gear 25 is meshed with two adjacent blade gears 231.

The rotor 24 is further provided with a receiving groove 241 for receiving the rotating blade 23, the receiving groove 241 is of a circular structure, and the rotating blade 23 is horizontally arranged in the receiving groove 241. The fixed gear 222 and the blade gear 231 have the same module and number of teeth. When the rotating blades 23 are subjected to the pressure of the liquid, the pressure is transmitted to the rotating wheel 22 to push the rotating wheel 22 to rotate, the blade gear 231 rotates through the connecting gear 25 and the fixed gear 222, and under the reversing action of the connecting gear 25, the fixed gear 222 and the blade gear 231 rotate in the same direction and at the same speed, namely, the rotating blades 23 and the rotor 24 rotate synchronously, so that the rotating blades 23 are always kept in a horizontal state relative to the rotor 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 rotating blade 23 rotates to the inner boss 26, the inner boss 26 is blocked with the rotating blade 23, and the rotating blade 23 reversely rotates to the accommodating groove 241; after the rotor blade 23 passes the position of the inner boss 26, the rotor blade 23 is rotated out of the receiving groove 241 by the pressure of the liquid, thereby converting the potential energy of the liquid into the kinetic energy of the rotor 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 rotating blades 23 to rotate, the rotating blades 23 rotate to the inner bosses 26 and are stopped by the inner bosses 26 in the circumferential direction and reversely rotate into the accommodating grooves 241, 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 rotating blades 23 and drives the rotating wheel 22 to rotate towards the direction of the liquid outlet 212, after the rotating blades 23 pass over 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 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 flows uniformly.

The first passages 112 and the second passages 113 are alternately arranged in two in the circumferential direction of the pump housing 11, that is, the number of the first passages 112 is the same as the number of the liquid inlets 211 of the hydraulic motor 2, and the number of the second passages 113 is the same as the number of the liquid inlets 212 of the hydraulic motor 2. Each first channel is provided with a flow control switch 3, the flow control switch 3 is used for being in signal connection with a control system of a vehicle, and the flow control switch 3 receives a flow signal of the control system of the vehicle to control the flow of the liquid. The control system transmits a flow signal to the flow control switch 3 according to the vehicle speed, when the vehicle speed is low, the torque required by the vehicle is large, at the moment, the control system transmits a flow increasing signal to the flow control switch 3, and the opening degree of the flow control switch 3 is increased so as to increase the flow of the liquid transmitted to the hydraulic motor 2; when the vehicle speed is high and the vehicle needs to be decelerated, the rotating speed required by the vehicle is small, the control system transmits a flow reducing signal to the flow control switch 3 at the moment, the opening degree of the flow control switch 3 is reduced so as to reduce the flow of the liquid transmitted to the hydraulic motor 2, and the liquid drives the output shaft 14 to rotate through the receiving wheel 15 at the moment so as to control the output rotating speed of the output shaft 14.

A check valve 4 is also disposed on each first passage 112, and the check valve 4 allows the liquid to flow along the first passage 112 only in the direction of the hydraulic motor 2 without flowing back to the centrifugal pump 1. The liquid backflow can lead to the reverse rotation of the rotating wheel of the hydraulic motor, and the one-way valve 4 can ensure that the liquid cannot flow back when the load is overlarge, so that the reverse rotation of the rotating wheel is avoided.

The utility model discloses a working process does: 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 rotating blades 23, the potential energy of the liquid is converted into rotational energy, 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 vehicle is started at a low speed, the flow control switch 3 controls the flow of the liquid to increase, the liquid pushes the rotating wheel 22 of the hydraulic motor 2 to rotate, the rotating speed of the hydraulic motor 2 is low, the torque is large when the hydraulic motor rotates at the low speed, the output power is also large, and the external output of the transmission is mainly provided by the hydraulic motor 2; when the vehicle runs at a high speed, the flow control switch 3 controls the flow of the liquid to be large, the liquid drives the output shaft 14 to rotate through the receiving wheel 15, and the external output of the transmission is mainly provided by the receiving wheel 15.

To sum up, the embodiment of the present invention provides a hydraulic centrifugal force transmission, wherein a first channel on a pump casing of a centrifugal pump communicates with a liquid containing cavity and a liquid inlet of a hydraulic motor, and a second channel communicates with a liquid containing cavity and 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 a rotating wheel of the hydraulic motor is driven by the liquid to rotate and then flow back to the liquid containing cavity through the second channel, so as to form liquid circulation; when the vehicle is started at a low speed, the flow control switch controls the flow of liquid to be gradually increased, the liquid pushes the rotating wheel of the hydraulic motor to rotate and drives the output shaft to rotate, and the torque is large when the hydraulic motor rotates at the low speed due to the low rotating speed of the hydraulic motor, so that the requirement of high torque output of the vehicle is met by reasonably utilizing the characteristics of the hydraulic motor; when the vehicle runs at a high speed, the flow control switch controls the flow of the liquid to increase, when the rotating speed of the output shaft reaches a certain value, the output power of the hydraulic motor is gradually weakened or disappeared due to overhigh rotating speed of the output shaft, the main shaft drives the output shaft to rotate through the impeller and the receiving wheel, the output of the impeller is high-speed, the requirement of the vehicle or other equipment for high-speed running is met, the motion potential energy and the pressure energy generated by the centrifugal pump on the liquid are simultaneously utilized, when the rotating speed of the main shaft is 0, the power requirement on the centrifugal pump is close to 0 when the output shaft keeps the same large torque, the speed change is well finished, and the energy is saved. The shell of the outer ring chamber 111 and the liquid inlet 211 of the hydraulic motor 2 can be respectively provided with a threaded hole for adding hydraulic oil, the threaded holes are communicated with the outside and used when the hydraulic oil is added and replaced, the screw is used for screwing up and sealing after the hydraulic oil is replaced, before the equipment is used for the first time, the hydraulic oil needs to be injected into the equipment through one threaded hole, the air is discharged from the other threaded hole, the injection and the rotation are carried out when the hydraulic oil is injected, so that the cavities of the centrifugal pump and the hydraulic motor are filled with the hydraulic oil, and the air cannot be reserved.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, without departing from the technical principle of the present invention, several improvements and replacements can be made, such as changing the centrifugal pump into a common centrifugal pump in the prior art, or changing the hydraulic motor into a common piston hydraulic motor or gear motor, etc., and these improvements and replacements should also be considered as the protection scope of the present invention.

Claims (10)

1. A hydraulic centrifugal force transmission is characterized by comprising a centrifugal pump, a potential energy receiving device, a hydraulic motor and an output shaft, wherein the centrifugal pump comprises a pump shell, a main shaft rotationally assembled on the pump shell and a vane wheel rotationally assembled on the main shaft, the output shaft is 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 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, and the rotating wheel is in transmission connection with the output shaft; the pump shell is provided with a first channel for communicating the liquid containing cavity with a liquid inlet of the hydraulic motor and a second channel for communicating the liquid containing cavity with a liquid outlet of the hydraulic motor, and the first channel is provided with a flow control switch.

2. The hydraulic centrifugal force transmission of claim 1, wherein a one-way valve is further disposed on the first passage for unidirectional flow of fluid to the hydraulic motor.

3. The hydrostatic centrifugal force transmission of claim 1, wherein the first and second passages are alternately arranged in two in a circumferential direction of the pump housing, and the flow control switch is disposed on each first passage.

4. The hydrostatic centrifugal force transmission of any one of claims 1-3, wherein the impeller is of a hollow structure, the impeller having a cavity separated from the fluid chamber.

5. The hydraulic centrifugal force transmission as recited in claim 4, wherein the impeller includes 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 a circumferential direction of the main body, and the cavity is arranged on the main body.

6. The hydrostatic centrifugal force transmission of claim 5, wherein the body has a radial clearance from an inner wall of the pump housing.

7. The hydrodynamic centrifugal force transmission as claimed in any one of claims 1 to 3, wherein the inner wall of the impeller is provided with a fluid channel extending in the axial direction of the impeller.

8. The hydrostatic centrifugal force transmission of any one of claims 1-3, wherein the first passage communicates with the outer annular chamber.

9. The hydrostatic centrifugal force transmission of any one of claims 1-3, wherein the fluid-containing chamber has an inner chamber wall of decreasing diameter in a direction from the centrifugal pump to the hydraulic motor, a reduced end of the inner chamber wall communicating with the second passage.

10. The hydrostatic centrifugal force transmission of any one of claims 1-3, wherein the hydraulic motor has at least two fluid inlets and outlets, the fluid inlets and outlets being arranged alternately in a circumferential direction of the housing.

Images