Multi-acting vane hydraulic motors for heavy machinery

Abstract

A multi-acting vane hydraulic motor for heavy machinery, comprising a stator and an outer plate, wherein the cross section of the inner surface of the stator is formed by N large arcs and N small arcs interlaced and smoothly connected in sequence, N being a natural number greater than 2, and the outer plate is provided with N evenly distributed oil ports I and N evenly distributed oil ports II on the side facing the blades, respectively, the N oil ports I and the N oil ports II are arranged alternately in sequence, the oil ports I are connected to the oil ports I, and the oil ports II are connected to the oil ports II. Since the cross section of the inner surface of the stator is formed by N large arcs and N small arcs interlaced and smoothly connected in sequence, the blades can convert pressure energy into mechanical energy N times when they rotate one circle, thereby doubling the output power of the multi-acting vane hydraulic motor without changing the overall appearance size, saving installation space.

Description

Technical Field

[0001] The present invention relates to a power device for heavy machinery, and more particularly to a multi-acting vane hydraulic motor for heavy machinery. Background Art

[0002] A hydraulic motor is a conversion device that converts the pressure energy of a liquid into mechanical energy, outputting torque and speed. Compared with other types of motors, its outstanding advantages are larger output torque, larger power-to-weight ratio, and easy implementation of fast and impact-free stepless speed change and reversing over a wide range.

[0003] The above advantages of hydraulic motors make them widely used as power actuators in heavy machinery. With the development of the times and the progress of society, the power demand in heavy machinery required for various large-scale infrastructure construction continues to reach new highs, and hydraulic motors that can output high power are urgently needed.

[0004] The output power of hydraulic motors in the prior art is generally increased by increasing the volume of the hydraulic motor, which places high demands on the heavy machinery itself and requires a large space to arrange the hydraulic motor. Summary of the invention

[0005] In order to overcome the above defects, the technical problem to be solved by the present invention is to provide a multi-acting vane hydraulic motor for heavy machinery which can increase the power output exponentially without changing the overall appearance size.

[0006] The technical solution of the present invention to solve the problems existing in the prior art is: a multi-acting vane hydraulic motor for heavy machinery, which includes an outer shell, an inner shell, oil port I and oil port II, an outer plate and an inner plate are arranged in the inner cavity jointly formed between the outer shell and the inner shell, a stator is arranged between the outer plate and the inner plate, a rotor is arranged in the stator, a plurality of blade grooves are uniformly distributed on the outer peripheral surface of the rotor in the circumferential direction, slidable blades are arranged in the blade grooves, the cross section of the inner surface of the stator is surrounded by N large arcs and N small arcs that are staggered and smoothly connected in sequence, N is a natural number greater than 2, N uniformly distributed oil ports I and N uniformly distributed oil ports II are respectively arranged on the side of the outer plate facing the blades, the N oil ports I and the N oil ports II are staggered in sequence, the oil port I is connected with the oil port I, and the oil port II is connected with the oil port II.

[0007] The vane hydraulic motor has a compact structure and has the smallest overall size compared to other hydraulic motors when outputting the same power, so the vane hydraulic motor is the best choice. Compared with other hydraulic motors, the vane hydraulic motor has a unique structure. It uses more than ten blades to divide the space surrounded by the outer plate, inner plate, stator, and rotor into more than ten cavities at equal angles. Since the cross section of the rotor is circular, and the cross section of the inner surface of the stator is surrounded by multiple arc lines of different curvatures, the volumes of adjacent cavities separated by the blades are different. The pressure of the same mass of hydraulic oil in the smaller cavity will be higher than the pressure in the larger cavity. Therefore, after the high-pressure hydraulic oil enters the smaller cavity from the oil supply line, it will push the blade to move toward the cavity with lower pressure and larger volume, thereby realizing the rotation of the vane hydraulic motor. The hydraulic oil that has released the pressure energy returns to the oil storage tank from the return oil line, completing the function of converting the pressure energy into mechanical energy.

[0008] The cross section of the inner surface of the stator of the prior art vane hydraulic motor is nearly elliptical, and the vane releases hydraulic energy twice when it rotates one circle, so it is called a double-acting vane hydraulic motor.

[0009] According to the actual need of outputting a relatively large power, the inventor of the present invention has arranged the cross section of the inner surface of the stator to be surrounded by N large arcs and N small arcs that are staggered and smoothly connected in sequence, where N is a natural number greater than 2. In this way, the blades can convert pressure energy into mechanical energy N times when they rotate one circle, that is, N blades out of more than ten blades simultaneously play the role of converting pressure energy into mechanical energy. Therefore, the power output of the present invention is N / 2 times the output power of the double-acting vane hydraulic motor in the prior art without changing the overall appearance size.

[0010] As a further technical solution, the inner plate is provided with 2N evenly distributed oil passage cavities on the side facing the blades, which is conducive to uniform thrust of the high-pressure hydraulic oil on the blades.

[0011] As a further technical solution, an oil storage chamber is provided in the rotor, and the oil storage chamber is connected with the bottom of the blade groove through a through hole. The outer plate and the inner plate are respectively provided with oil storage chambers, and the oil storage chamber can also be connected with the oil storage chamber through a through hole.

[0012] Since the speed of vane hydraulic motors is generally slow, the centrifugal force of the blades is not enough to support the reliable contact between the top of the blade and the inner surface of the stator. To solve this problem, the oil storage chamber with high-pressure hydraulic oil is introduced into the oil storage chamber through the through hole, and then enters the bottom of the blade groove through the through hole. The high-pressure hydraulic oil acts on the root of the blade to reliably contact the top of the blade against the inner surface of the stator.

[0013] As a further technical solution, the outer plate and the inner plate are provided with arc-shaped grooves on the side facing the rotor, and the oil storage cavity is the space enclosed by the arc-shaped grooves and the rotor. The number of arc-shaped grooves provided on the outer plate and the inner plate is 2 respectively, and the arc-shaped grooves of the outer plate and the inner plate are arranged alternately, and the arc-shaped grooves extend for a certain length, so that the high-pressure hydraulic oil in the oil storage cavity will overflow in an appropriate amount, and a uniform high-pressure lubricating oil film will be established between the stator and the blades and the outer plate and the inner plate, which is beneficial to prolonging the service life of the vane hydraulic motor and stabilizing the output power of the vane hydraulic motor.

[0014] As a further technical solution, an annular groove is provided on the inner surface of the rotor, and the oil storage chamber is a space enclosed by the annular groove and the transmission shaft sleeved in the inner surface of the stator. The through holes are arranged on the rotor, and there are 6 of them, 3 on each side of the rotor, and the through holes on both sides of the rotor are arranged alternately. The 2 oil storage chambers on the outer plate and the inner plate are also arranged alternately. There is always one of the 6 through holes connected to the oil storage chamber. The oil storage chamber is made into an annular shape, which is conducive to the blade root always being supported by high-pressure hydraulic oil.

[0015] The beneficial effects of the present invention are as follows: since the cross-section of the inner surface of the stator is formed by N large arcs and N small arcs being staggered and smoothly connected in sequence, the blades can convert pressure energy into mechanical energy N times when they rotate one circle, thereby doubling the output power of the multi-acting vane hydraulic motor without changing the overall appearance size, thereby saving installation space. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic cross-sectional view of a structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the stator structure in the present invention;

[0018] Figure 3 yes Figure 1 The R part is enlarged in the figure;

[0019] Figure 4 It is a schematic diagram of the outer plate structure in the present invention;

[0020] Figure 5 yes Figure 3 AA cross-sectional view in FIG.

[0021] Figure 6 yes Figure 3 BB cross-sectional view in

[0022] Figure 7 It is a schematic diagram of the rotor structure in the present invention;

[0023] Figure 8 It is a schematic diagram of the inner side plate structure in the present invention.

[0024] In the figure: 1: outer shell, 2: outer plate, 3: oil passage I, 4: rotor, 5: blade groove, 6: oil passage II, 7: stator, 8: oil passage III, 9: inner plate, 10: inner shell, 11: through hole, 12: oil storage chamber, 13: through hole, 14: blade, 15: II oil port, 16: I oil port, 17: oil storage chamber, 18: sealing ring, 19: oil hole, 20: sleeve, 21: oil passage, 22: ball, 23: II oil passage, 24: oil control passage, 25: I oil passage, 26: oil storage chamber, 27: oil passage I, 28: oil passage II, 29: oil passage chamber. DETAILED DESCRIPTION

[0025] The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings.

[0026] Embodiment: A multi-acting vane hydraulic motor for heavy machinery, as shown in the figure (a four-acting vane hydraulic motor is taken as an example, and the process holes and transmission shafts irrelevant to this patent are omitted), which includes an outer shell 1 and an inner shell 10 fixedly connected together, an outer plate 2 and an inner plate 9 are arranged in the inner cavity formed by the outer shell 1 and the inner shell 10, a stator 7 is arranged between the outer plate 2 and the inner plate 9, and the cross section of the inner surface of the stator 7 is surrounded by four large arcs and four small arcs that are staggered and smoothly transitioned in sequence, a rotor 4 is arranged in the stator 7, and the outer peripheral surface of the rotor 4 is uniformly distributed with 16 blade grooves 5 in the circumferential direction, and the blade grooves 5 are provided with blades 14 that can slide along the blade grooves 5, and the inner surface of the rotor 4 is provided with an annular concave Groove, the annular groove and the transmission shaft sleeved in the inner surface of the rotor 4 together form an oil storage chamber 12, three evenly distributed through holes 11 are respectively provided on the two sides of the rotor 4, and the through holes 11 on the two sides of the rotor 4 are staggered. The oil storage chamber 12 is connected with the bottom of each blade groove 5 through a plurality of through holes 13, and the side of the outer plate 2 and the inner plate 9 facing the rotor 4 are respectively provided with two symmetrically arranged arc grooves, a pair of arc grooves on the outer plate 2 and a pile of arc grooves on the inner plate 9 are arranged at a 90° angle, and the arc grooves and the side of the rotor 4 together form an oil storage chamber 26, and the oil storage chamber 12 can be connected with the oil storage chamber 26 through six through holes 11, and the outer shell 1 and the outer plate 2 are connected. A sealing ring 18 is provided between the outer shell 1, the outer plate 2, and the sealing ring 18. The oil storage chamber 17 is a space surrounded by the outer shell 1, the outer plate 2, and the sealing ring 18. The oil storage chamber 17 is annular. The outer shell 1 is provided with an oil port I 16 and an oil port II 15. The outer plate 2 is provided with N uniformly distributed oil ports I 27 and N uniformly distributed oil ports II 28 on the side facing the blade 14. The N oil ports I 27 and the N oil ports II 28 are arranged alternately in sequence. The oil port I 27 is connected to the oil port I 16, and the oil port II 28 is connected to the oil port II 15. The outer plate 2 is provided with an oil passage I 25 connected to the oil port I 16 at the position of the oil port I 16. The outer plate 2 is provided with a side of the oil passage I 25 connected to the oil port II 15. The oil passages 23 are connected to each other, and an oil control passage 24 is provided between the oil passages 25 and 23. An oil passage 21 connected to the oil passages 24 and the oil storage chamber 17 is provided between the oil control passage 24 and the oil storage chamber 17. A ball 22 is provided in the oil control passage 24 for controlling the connection and disconnection between the oil passages 25 and 23 and the oil passage 21. The diameters of the balls 22 are larger than the diameters of the oil passages 25, 23 and 21. In order to load the balls 22, a process hole with a diameter larger than or equal to the oil control passage 24 is provided at one end of the oil control passage 24. After the balls 22 are loaded, a sleeve 20 is provided in the process hole, and the sleeve 20 is used to limit the balls 22. Then, a plug is used to close the process hole and limit the sleeve 20. The sleeve 20 is provided with an oil passage 19.The diameter of the oil hole 19 is smaller than the diameter of the ball 22. The oil hole 19 is connected to the oil passage Ⅰ 25. The insert 20 and the oil passage Ⅱ 23 are arranged on both sides of the ball 22. The outer plate 2 is provided with an oil passage Ⅰ 3, the stator 7 is provided with an oil passage Ⅱ 6, and the inner plate 9 is provided with an oil passage Ⅲ 8. The oil storage chamber 17 is connected to the oil storage chamber 26 on the outer plate 2 through the oil passage Ⅰ 3. The oil storage chamber 17 is also connected to the oil storage chamber 26 on the inner plate 9 through the oil passage Ⅰ 3, the oil passage Ⅱ 6, and the oil passage Ⅲ 8 in sequence. The inner plate 9 is provided with 8 evenly distributed oil passages 29 on the side facing the blade 14.

[0027] In the embodiment, both the oil port I and the oil port II are arranged on the outer shell, and the outer plate is provided with oil passages I and II corresponding to the oil ports I and II, and an oil control passage is arranged between the oil passages I and II, and an oil control mechanism is arranged in the oil control passage. Regardless of whether the oil port I or the oil port II is used as the input port of the high-pressure hydraulic oil, the high-pressure hydraulic oil can be introduced into the oil storage cavity of the outer plate and the inner plate at the same time, so that a high-pressure lubricating oil film is established between the blade and the outer plate and the inner plate arranged on both sides of the blade, and at the same time, reliable contact between the top of the blade and the inner surface of the stator is ensured when the rotor rotates at a low speed. The purpose of arranging both the oil port I and the oil port II on the outer shell is to make the layout of the supply and return oil pipelines of the multi-acting vane hydraulic motor concentrated on the outside, so that most of the volume of the multi-acting vane hydraulic motor can be arranged in a relatively small space, further effectively saving the layout space of the multi-acting vane hydraulic motor. The oil control principle of the oil control mechanism: The oil control mechanism can be a solenoid valve, a pneumatic control valve, or a manual switching valve. The present invention preferably uses a ball, and the diameter is larger than the diameters of oil channel I, oil channel II, and oil channel. When oil channel I is used as the oil inlet, oil channel II is the oil return channel. The ball rolls toward oil channel II of low-pressure hydraulic oil under the push of the high-pressure hydraulic oil in oil channel I, and blocks oil channel II to ensure that oil channel I is only connected to the oil channel; when oil channel II is used as the oil inlet, oil channel I is the oil return channel. The ball rolls toward oil channel I of low-pressure hydraulic oil under the push of the high-pressure hydraulic oil in oil channel II, and blocks oil channel I to ensure that oil channel II is only connected to the oil channel. In this way, no matter which of oil channel I and oil channel II is the oil inlet, it can ensure that a high-pressure lubricating oil film is established on both sides of the blade and the oil supply pipeline at the root of the blade is supplied with high-pressure hydraulic oil. By using balls as the oil control mechanism, other auxiliary mechanisms, such as electronic control mechanisms, pneumatic mechanisms, etc., can be omitted, while at the same time timely responding to changes in the flow direction of the high-pressure hydraulic oil can be achieved.

[0028] In the embodiment, a sleeve is further provided in the oil control channel, and an oil hole is provided in the sleeve. The diameter of the oil hole is smaller than the diameter of the ball. The oil hole is connected to the oil channel I, and the sleeve and the oil channel II are arranged on both sides of the ball. Since the diameter of the ball is larger than the diameters of the oil channel I, the oil channel II, and the oil channel, in order to load the ball, a process hole with a diameter larger than or equal to the oil control channel needs to be established at one end of the oil control channel. After the ball is loaded, the sleeve is used to limit the ball, and then the plug is used to close the process hole and limit the sleeve, which is conducive to the smooth implementation of the function of the oil control mechanism by the ball.

[0029] In the embodiment, a sealing ring is provided between the outer shell and the outer plate, and the oil storage cavity is a space enclosed by the outer shell, the outer plate and the sealing ring, and the oil storage cavity is annular. The oil storage cavity can be provided in the outer shell or in the outer plate. The present invention utilizes the gap between the outer shell and the outer plate to enclose an annular cavity with a sealing ring, which can not only simplify the processing technology and reduce the manufacturing cost, but also can simultaneously meet the multiple oil supply pipelines necessary for establishing a high-pressure lubricating oil film on both sides of the blade and supplying pressure to the root of the blade.

[0030] The above-described embodiment is only a preferred solution of the present invention and does not limit the present invention in any form. There are other variations and modifications without exceeding the technical solution described in the claims.

[0031] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A multi-acting vane hydraulic motor for heavy machinery, comprising an outer shell, an inner shell, oil ports I and II, an outer plate and an inner plate are arranged in an inner cavity formed by the outer shell and the inner shell, a stator is arranged between the outer plate and the inner plate, a rotor is arranged in the stator, a plurality of blade grooves are uniformly distributed on the outer circumference of the rotor, and slidable blades are arranged in the blade grooves, It is characterized in that The cross section of the inner surface of the stator is surrounded by N large arcs and N small arcs that are smoothly connected in sequence and staggered, N is a natural number greater than 2, the centers of the large arcs and the small arcs are both located on one side of the rotor, and the side of the outer plate facing the blades is respectively provided with N evenly distributed oil ports I and N evenly distributed oil ports II, the N oil ports I and the N oil ports II are arranged in sequence and staggered, the oil port I is connected to the oil port I, and the oil port II is connected to the oil port II.

2. The multi-acting vane hydraulic motor for heavy machinery according to claim 1, It is characterized in that The inner plate is provided with 2N evenly distributed oil passage cavities on one side facing the blades.

3. The multi-acting vane hydraulic motor for heavy machinery according to claim 1 or 2, It is characterized in that An oil storage chamber is provided in the rotor, and the oil storage chamber is connected with the bottom of the blade groove through a through hole. The outer plate and the inner plate are respectively provided with oil storage chambers, and the oil storage chamber can also be connected with the oil storage chamber through a through hole.

4. The multi-acting vane hydraulic motor for heavy machinery according to claim 3, It is characterized in that The side surfaces of the outer plate and the inner plate facing the rotor are provided with arc-shaped grooves, and the oil storage cavity is a space enclosed by the arc-shaped grooves and the rotor.

5. The multi-acting vane hydraulic motor for heavy machinery according to claim 3, It is characterized in that An annular groove is arranged on the inner surface of the rotor, and the oil storage chamber is a space enclosed by the annular groove and a transmission shaft sleeved in the inner surface of the rotor.

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