A synchronous automatic clutch oil supply slip ring applicable to high rotational speeds

Abstract

The present invention provides an oil supply slip ring applicable to high rotational speeds for a synchronous automatic clutch, which includes an oil supply slip ring and a slip ring mounting groove. The slip ring mounting groove is located on the connecting shaft of the synchronous automatic clutch. An axial oil hole is opened on the connecting shaft and is communicated with the slip ring mounting groove through an oil collecting ring groove. The slip ring assembly adopts a split structure. An oil supply joint and a limiting structure are arranged on the outer side of the slip ring assembly. The surface of the part thereof that cooperates with the slip ring mounting groove is cast with tin bronze material. Axially distributed flow channels are opened on the inner surface of the slip ring for lubricating the mating surface. The slip ring assembly is floatingly mounted in the slip ring mounting groove, and the rotation of the floating slip ring following the rotating connecting shaft is restricted by a limiting rod connected to a fixed frame. This invention patent of the present invention is applicable to a high-rotational-speed synchronous automatic clutch connected in series in a unit shafting. This kind of oil supply slip ring has a simple structure. The flow channels on the rotating connecting shaft are mainly axial flow channels, which reduces the requirements of the synchronous automatic clutch for the oil supply pressure and makes the lubrication system of the unit simpler.

Description

Technical Field

[0001] The present invention relates to an oil supply ring, particularly for supplying oil to a synchronous automatic clutch operating at high speeds. Background Art

[0002] As a connecting device in a mechanical system, synchronous automatic clutches have a wide range of applications. The clutch itself has a complex structure, and its internal torque transmission teeth and ratchet pawl mechanism must operate under lubricated conditions to ensure long-term reliable operation. Due to the structural characteristics of the synchronous automatic clutch, the ratchet pawl is generally arranged in the innermost layer of the clutch. The oil supply structure must be able to supply lubricating oil to the position where the ratchet pawl is located. If the oil supply structure cannot supply oil to the deep inside of the clutch, it is necessary to change the position of the clutch ratchet pawl to adapt to the oil supply structure of the clutch, resulting in an overly large radial design size of the clutch, causing design waste, and having an adverse impact on the dynamic characteristics of the shafting where the clutch is located.

[0003] Synchronous automatic clutches are generally installed inside a gearbox or directly connected in series to the equipment shafting. When installed inside a gearbox, there is generally a free end in the internal shafting of the gearbox where the clutch is located. This free end is not connected to other equipment, and an axial oil passage hole can be machined at the center position of this shaft end. One end of the hole is connected to the clutch, and the other end is connected to an oil supply pipe. This oil supply method can supply lubricating oil to the deepest part of the clutch.

[0004] However, when the clutch is directly connected in series to the equipment shafting, there is no free end for installing the lubricating oil pipe. Currently, the Figure 1 shown oil supply structure is used. A lubrication flow passage is opened at the support bearing of the clutch input shaft, and the lubricating oil enters the synchronous automatic clutch through the radial oil hole on the input shaft. Under high-speed operating conditions, the input shaft is in a rotating state. Affected by the centrifugal force, when the lubricating oil is supplied into the clutch, it is necessary to overcome the centrifugal pressure Pω generated by the fluid in the section from R1 to R2 in the input shaft oil hole at the entrance of the radial oil hole.

[0005] Where Pω = 1 / 2 * ρ * (ω / 60 * 2 * pi)^2 * (R1^2 - R2^2) / 1000000, in the formula,

[0006] R1, the outer radius of the oil inlet hole, m

[0007] R2, the inner radius of the oil inlet hole, m

[0008] ρ, the oil density, kg / m^3

[0009] ω, the rotational speed, r / min

[0010] Therefore, to achieve the minimum oil supply pressure at the clutch oil supply requirement R1 > Pω, the higher the rotational speed and the larger the shaft diameter, the higher the Pω value. The problem of difficult oil supply limits the application of the synchronous automatic clutch in the high-speed series shafting system and urgently needs to be solved. Summary of the Invention

[0011] The purpose of the present invention is to solve the problem of difficult oil supply of the existing synchronous automatic clutch in the high-speed series shafting system, and provide an oil supply slip ring.

[0012] The technical solution adopted by the present invention to solve its technical problems is:

[0013] The beneficial effect of the present invention is that for the series high-speed synchronous automatic clutch, this oil supply slip ring structure is simple, and the flow channel on the rotating part is mainly the axial flow channel, which reduces the requirement of the synchronous automatic clutch for the oil supply pressure and makes the lubrication system of the synchronous automatic clutch application unit simpler. Description of the Drawings

[0014] The following further describes the present invention in conjunction with the drawings and embodiments.

[0015] Figure 1 It is the existing clutch oil supply structure diagram;

[0016] Figure 2 It is the axial sectional view of the oil supply slip ring;

[0017] Figure 3 It is the section of the oil supply slip ring perpendicular to the axis Figure Ⅰ ( Figure 2 section A-A in);

[0018] Figure 4 It is the section of the oil supply slip ring perpendicular to the axis Figure Ⅱ ( Figure 2 section B-B in);

[0019] Figure 5 It is the external shape diagram of the slip ring assembly after removing the connecting shaft.

[0020] In the figure, 100. sliding bearing, 200. input shaft, 210. radial oil hole, 300. synchronous automatic clutch, 11. connecting shaft, 11a. oil collecting ring groove, 21. slip ring base Ⅰ, 21a. base Ⅰ casting alloy layer Ⅰ, 21b. base Ⅰ casting alloy layer Ⅱ, 21c. base Ⅰ casting alloy layer Ⅲ, 22. slip ring base Ⅱ, 22a. base Ⅱ casting alloy layer Ⅰ, 22b. base Ⅱ casting alloy layer Ⅱ, 22c. base Ⅱ casting alloy layer Ⅲ, 31. limiting rod, 32. connecting sleeve Ⅰ, 33. connecting sleeve Ⅱ, 41. oil supply joint, 51. fixing bracket, 60. synchronous automatic clutch. Detailed Description of the Invention

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] Figure 2 Among them, the oil supply slip ring includes two parts, a slip ring assembly and a slip ring mounting groove. The slip ring mounting groove is located on the connecting shaft 11 of the synchronous automatic clutch 60, and the remaining parts form the slip ring assembly. A ring groove and an axial oil hole are provided on the connecting shaft (11) of the clutch. Lubricating oil is supplied from the oil supply joint 41, flows through the lubricating oil hole on the connecting shaft 11, and finally enters the synchronous automatic clutch 60. In the working state, the synchronous automatic clutch 60 and its connecting shaft 11 rotate at a high speed, which will make it difficult for the fluid to flow radially on the connecting shaft 11. To ensure that the lubricating oil can effectively enter the axial oil hole on the connecting shaft 11, an oil collecting ring groove 11a with a certain width is provided at the junction of the ring groove and the axial oil hole. The width K of the oil collecting ring groove 11a is greater than 3 mm, and the maximum outer diameter dimension of the oil collecting ring groove 11a, the radial outer dimension of the axial oil hole, and the radial outer dimension of the internal oil groove of the oil supply slip ring are all L, and the three are kept consistent to ensure the axial flow of the lubricating oil. Under high-speed operating conditions, Figure 2 in the shown structure, the oil hole on the connecting shaft 11 is axial. Compared with Figure 1 the structure in Figure 2 the minimum pressure P required for oil supply to the clutch at the diameter L L＞0 is sufficient.

[0023] Figure 2 and Figure 4 and Figure 5The slip ring assembly and the annular groove on the connecting shaft 11 have three mating surfaces, one radial mating surface and two axial mating surfaces. The ratio of the diameter clearance at the radial mating surface D to the straight journal of the shaft is 1.5 - 2‰. When the connecting shaft 11 is running at high speed, the radial mating surface between the connecting shaft 11 and the slip ring is in a hydrodynamic lubrication state, avoiding direct contact between the friction surfaces and improving the service life of the slip ring assembly. The typical value of the clearance at the axial mating J is 0.1 - 0.3 mm. The working clearance is used to meet the lubrication requirements of the working surface, avoiding damage to the mating surface when the connecting shaft 11 rotates at high speed. At the same time, the clearance should not be too large to avoid excessive leakage of lubricating oil through the clearance. Among them, the matrix I casting alloy layer I 21a, matrix II casting alloy layer II 22b, and matrix I casting alloy layer III 21c on the slip ring matrix 21, and the matrix II casting alloy layer I 22a, matrix II casting alloy layer II 22b, and matrix II casting alloy layer III 22c on the slip ring matrix 22 adopt cast tin bronze materials or other antifriction materials. The antifriction materials can improve the running-in performance of the contact surface between the slip ring assembly and the connecting shaft 11, reduce the friction and wear of the contact surface, and improve the service life of the slip ring. The mating surface is lubricated by the lubricating oil supplied through the oil supply joint. 4 - 8 circumferentially evenly distributed flow channels are opened inside the slip ring matrix I 21 and the slip ring matrix II 22 of the oil supply slip ring. The cross-sectional shape of the flow channel is arc-shaped. One of the flow channels is connected to the oil circuit of the oil supply joint 41. The flow channel is used to ensure effective lubrication of the mating surface and sufficient lubricating oil enters the axial oil hole.

[0024] Figure 4 、 Figure 5 In the [description], the slip ring assembly adopts a split structure with a split surface. The slip ring matrix I 21 and the slip ring matrix II 22 are connected by bolts and positioning pins. An oil supply joint 41 and a limiting structure are arranged on the outside of the slip ring assembly. The limiting structure is realized through the limiting rod 31. One side of the limiting rod 31 is sleeved on the connecting sleeve I 32 through a clearance fit and fixed on the slip ring matrix II 22 by bolt connection. The other side of the limiting rod 31 is sleeved on the connecting sleeve II 33 through a clearance fit and fixed on the fixing frame 51 by bolt connection. The clearance between the limiting rod 31 and the connecting sleeve I 32 and the clearance between the limiting rod 31 and the connecting sleeve II 33 at H are greater than 1 mm, enabling the limiting rod 31 to play a role in the rotation of the slip ring but not bearing the mass of the oil supply slip ring. The mass of the oil supply slip ring is borne by the connecting shaft 11, avoiding the situation of over-positioning of the slip ring and preventing the slip ring from generating excessive additional force on the connecting shaft 11.

[0025] The present invention comprises a slip ring body, a slip ring mounting groove, a limiting structure, etc. The characteristics are that the slip ring mounting groove is located on the connecting shaft of the synchronous automatic clutch. An axial oil hole is opened on the connecting shaft and is communicated with the slip ring mounting groove through an oil collecting ring groove. The slip ring body is floatingly mounted in the slip ring mounting groove, and the rotation of the slip ring body along with the connecting shaft is restricted by an external limiting mechanism. An oil collecting ring groove with a certain depth is provided at the junction of the ring groove and the axial oil hole. The depth of the oil collecting ring groove is greater than 3 mm, and the maximum outer diameter dimension of the oil collecting ring groove, the radial outer dimension of the axial oil hole, and the radial outer dimension of the internal oil groove of the slip ring assembly are kept consistent to ensure the effective axial flow of lubricating oil. There are three mating surfaces between the oil supply slip ring and the slip ring mounting groove on the connecting shaft, one radial mating surface and two axial mating surfaces. The ratio of the diameter clearance to the shaft straight diameter at the radial mating surface is 1.5 - 2‰, and the typical value of the axial mating clearance is 0.1 - 0.3 mm. The working surface material on the side of the oil supply slip ring is tin bronze or other antifriction materials. 4 - 8 circumferentially evenly distributed flow channels are opened inside the oil supply slip ring, and the cross-sectional shape of the flow channels is arc-shaped. One of the flow channels is communicated with the oil circuit of the oil supply joint. The limiting structure is realized through a limiting rod. The two sides of the limiting rod are respectively connected to the oil supply slip ring and the box body where the clutch is located. There is a certain installation clearance between the connection pairs of the limiting rod and the oil supply slip ring and the box body where the clutch is located, so that the limiting rod can restrict the rotation of the oil supply slip ring but does not restrict bearing the mass of the oil supply slip ring, making the oil supply slip ring in a floating state, and the mass of the slip ring is borne by the connecting shaft.

[0026] An oil supply slip ring for a high-speed synchronous automatic clutch. It consists of two parts, an oil supply slip ring and a slip ring mounting groove. The slip ring mounting groove is located on the connecting shaft of the synchronous automatic clutch. An axial oil hole is opened on the connecting shaft and is communicated with the slip ring mounting groove through an oil collecting ring groove with a certain width. The slip ring assembly adopts a split structure. An oil supply joint and a limiting structure are arranged on the outer side of the slip ring assembly. The surface of the part that mates with the slip ring mounting groove is cast with tin bronze material. Axially evenly distributed flow channels are opened on the inner surface of the slip ring for lubricating the mating surface. The slip ring assembly is floatingly mounted in the slip ring mounting groove, and the rotation of the floating slip ring following the rotating connecting shaft is restricted by a limiting rod connected to a fixed frame. This invention patent of the present invention is applicable to a high-speed synchronous automatic clutch connected in series in the unit shafting. This kind of oil supply slip ring has a simple structure. The flow channels on the rotating connecting shaft are mainly axial flow channels, which reduces the requirements of the synchronous automatic clutch for the oil supply pressure and makes the lubrication system of the unit simpler.

Claims

1. A synchronous automatic clutch oil supply slip ring applicable to high rotational speeds, characterized in that, It includes a slip ring assembly and a slip ring mounting groove, and the slip ring mounting groove is located on the connecting shaft (11) of the synchronous automatic clutch (60); a ring groove and an axial oil hole are provided on the connecting shaft (11) of the synchronous automatic clutch (60), and lubricating oil is supplied from the oil supply joint (41), flows through the lubricating oil hole on the connecting shaft (11), and finally enters the synchronous automatic clutch (60); an oil collecting ring groove (11a) with a certain width is provided at the junction of the ring groove and the axial oil hole, the width K of the oil collecting ring groove (11a) is greater than 3 mm, and the maximum outer diameter dimension of the oil collecting ring groove (11a), the radial outer dimension of the axial oil hole, and the radial outer dimension of the internal oil groove of the oil supply slip ring are all L, and the three are kept consistent to ensure the axial flow of the lubricating oil; the slip ring assembly adopts a split structure with a split plane, the slip ring base body I (21) and the slip ring base body II (22) are connected by bolts and positioning pins, an oil supply joint (41) and a limiting structure are arranged on the outer side of the slip ring assembly, the limiting structure is realized through a limiting rod (31), one side of the limiting rod (31) is sleeved on the connecting sleeve I (32) through a clearance fit and fixed on the slip ring base body II (22) by bolt connection, the other side of the limiting rod (31) is sleeved on the connecting sleeve II (33) through a clearance fit and fixed on the fixing frame (51) by bolt connection, and the clearance between the limiting rod (31) and the connecting sleeve I (32), and the clearance between the limiting rod (31) and the connecting sleeve II (33) at H is greater than 1 mm, so that the limiting rod (31) can make the slip ring rotate, but does not bear the mass of the oil supply slip ring, and the mass of the oil supply slip ring is borne by the connecting shaft (11), avoiding the situation of over-positioning of the slip ring and causing too large an additional force on the connecting shaft (11).

2. The synchronous automatic clutch oil supply slip ring applicable to high rotational speeds according to claim 1, characterized in that, There are three mating surfaces between the slip ring assembly and the ring groove on the connecting shaft (11), one radial mating surface and two axial mating surfaces. The ratio of the diameter clearance to the shaft diameter at the radial mating surface D is 1.5 - 2‰, and the typical value of the axial clearance at J is 0.1 - 0.3 mm. Among them, the matrix I casting alloy layer I (21a), the matrix II casting alloy layer II (22b), and the matrix I casting alloy layer III (21c) on the slip ring base body I (21), and the matrix II casting alloy layer I (22a), the matrix II casting alloy layer II (22b), and the matrix II casting alloy layer III (22c) on the slip ring base body II (22) improve the running-in performance of the contact surface between the slip ring assembly and the connecting shaft (11); the mating surfaces are lubricated by the lubricating oil supplied from the oil supply joint (41). 4 - 8 circumferentially evenly distributed flow channels are provided inside the oil supply joint (41) of the slip ring base body I (21) and the slip ring base body II (22). The cross-sectional shape of the flow channel is arc-shaped, and one of the flow channels is communicated with the oil circuit of the oil supply joint (41). The flow channel is used to ensure effective lubrication of the mating surface and sufficient lubricating oil enters the axial oil hole.

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