WO2023201451A1

WO2023201451A1 - Hydraulic continuously variable transmission

Info

Publication number: WO2023201451A1
Application number: PCT/CN2022/087257
Authority: WO
Inventors: 林武光
Original assignee: 林武光
Priority date: 2022-04-18
Filing date: 2022-04-18
Publication date: 2023-10-26

Abstract

A hydraulic continuously variable transmission, which is applied to the fields of mechanical devices, vehicles and the like, and realizes stepless speed changing. The hydraulic continuously variable transmission consists of two annular hydraulic pumps, and adjusts a speed change ratio by adjusting the chamber depth ratio of the two hydraulic pumps.

Description

Hydraulic continuously variable transmission

Technical field

The invention is a hydraulic transmission used for mechanical transmission.

Background technique

At present, the known transmissions are basically implemented with gears, and the gear ratio needs to be adjusted to achieve speed changes. Stepless speed changes cannot be achieved, and the speed change process is complicated and time-consuming. Other non-geared continuously variable transmissions handle less torque.

technical problem

Current transmissions cannot combine smoothness and high torque.

Technical solutions

As shown in Figure 1, two variable-chamber hydraulic pumps are connected. One of them compresses the hydraulic oil, and the other rotates driven by the hydraulic oil. By adjusting the hydraulic chamber depth ratio of the hydraulic pump, the variable speed effect can be achieved.

As shown in Figure 2, which is a schematic diagram of a variable chamber hydraulic pump, the inner wall of the turntable 3, the disk core 4 and the groove cover 5 (visible in Figure 1) form an annular groove, and the groove is filled with fluid. When the groove bolt 6 is fixed and the turntable 3 rotates under the traction of external power, the fluid in the annular groove between the rotor 2 and the groove bolt 6 will be compressed and pressed into another hydraulic pump from the guide tube 7 to push Another hydraulic pump turns. The guide tube can be replaced by a hose, and the rotation direction of the output power can be adjusted by exchanging the inlet and outlet.

As shown in Figure 3, with the cooperation of gear set 1 (the large gear is fixed, the four small gears rotate around the large gear, the gear ratio is 2:1), when the groove bolt 6 rotates to the rotor 2 position, the gap in the rotor 2 Face the groove bolt 6 to prevent the groove bolt 6 from hitting the rotor 2.

In order to realize the adjustable depth of the annular groove, the rotor 2 is disassembled into two parts: a rotor sleeve 2-1 and a rotor core 2-2. The rotor sleeve 2-1 can slide along the axial direction of the rotor core. The disk core 4 can slide forward and backward along the direction of the central axis to change the depth of the annular groove. The rotor sleeve 2-1 slides accordingly to ensure the flatness and sealing of the bottom of the annular groove.

In the state of Figure 3, the slot bolt 6 is just at the position of the rotor 2. At this time, there is completely sealed fluid in the a1 area at the gap between the slot bolt 6 and the rotor 2. When the rotation continues, the turntable will be stuck and the rotation will not be smooth. , you can drill holes in the bottom or wall of area a1, and seal in an elastic space with an appropriate amount of elastic coefficient for pressure relief. If the sealing performance of the annular groove is not high, the curvature of the groove bolt can also be reduced to ensure that the a1 area will not be completely closed.

The phase difference between adjacent rotors depends on the total number of rotors. For example, the schematic diagram in the present invention lists four rotors, then the phase difference between adjacent rotors should be 90 degrees. There can also be multiple rotors, not limited to 4.

Counterweights can be used to maintain the dynamic balance of the rotor and reduce the vibration caused by the high-speed rotation of the rotor.

The rotor 2 in this solution is tangent to the outer surface of the inner ring of the disc core 4. If you want to improve the sealing performance, you can leave a fan-shaped groove on the inner ring wall of the disc core 4 and embed a small part of the rotor 2 into the inner ring of the disc core 4. In the wall.

beneficial effects

The speed change is smooth without step transitions, with less friction and loss, and is not prone to high temperatures.

Description of the drawings

Figure 1 is an exploded view; Figure 2 is an internal view of the annular groove; Figure 3 is an internal view of the annular groove - the groove bolt passes through the rotor; Figure 4 is a side cross-sectional view; Figure 5 is a typical size of the main components; Figure 6 is the rotor Dimensions typical.

Best Mode of Carrying Out the Invention

Four rotors are used to divide the annular groove, with a phase difference of 90 degrees. The gear ratio of the large and small gears in the gear set is 2:1. The arc of the slot bolt is 15 degrees. Figure 5 shows the typical dimensions of the main components; Figure 6 shows the typical dimensions of the rotor.

Embodiments of the invention

n rotors are used to divide the annular groove, with a phase difference of 360/n degrees.

Industrial applicability

Used in various machinery requiring variable speed, such as locomotives, ships, and fluid compressors.

Sequence Listing Free Content

none.

Claims

A hydraulic transmission is composed of two variable chamber hydraulic pumps connected.

2. The hydraulic transmission according to claim 1, changing the rotation speed ratio by changing the ratio of the compression surface of the hydraulic pump.

3. The hydraulic transmission according to claim 1, changing the direction of rotation by exchanging the inlets and outlets of the two hydraulic pumps.

4. A variable chamber hydraulic pump using an annular groove as the compression chamber.

5. The variable chamber hydraulic pump according to claim 4, which seals and compresses the annular groove in sections.

6. The variable chamber hydraulic pump according to claim 4, using a notched rotor to control the opening and closing of the annular groove.

7. According to the variable chamber hydraulic pump of claim 4, an elastic space with an appropriate coefficient is sealed by drilling holes to reduce the instantaneous high pressure in the rotor sealing area.

8. According to the variable chamber hydraulic pump of claim 4, the phase of the rotor is ensured through the gear set so that the rotor will not hit the groove bolt.

9. According to the variable cavity hydraulic pump of claim 4, the rotor is divided into a rotor sleeve and a rotor core, which can change the depth of the cavity on the premise of ensuring the sealing of the annular groove.