Shaft core cooling high-speed rotating sealing assembly

Abstract

The utility model discloses a shaft core cooling high-speed rotating sealing assembly which comprises a main shaft, a rear end cover, a connecting rod and a center rod. The rear end cover, the connecting rod and the center rod are provided with a liquid inlet channel and a main liquid return channel, the liquid inlet channel enters from the rear end cover, passes through the center rod and the connecting rod and then leads to the main shaft, and the main liquid return channel passes through the connecting rod and the center rod from the main shaft and then leads to the rear end cover; the main liquid return channel is further connected with an auxiliary liquid return channel. According to the utility model, a gap sealing and gas diversion backflow structure is adopted, so that leakage liquid can be effectively and reliably discharged.

Description

Technical Field

[0001] The utility model relates to shaft core cooling, in particular to a shaft core cooling high-speed rotating sealing component. Background Art

[0002] High-speed rotating components such as electric spindles use a core cooling structure, which can effectively improve power and rigidity and reduce thermal expansion. In the current cooling structure, due to the use of mechanical seals, some liquid will leak during the cooling and return process, and the leaked liquid will enter the front end of the component, causing damage to the operation of the shaft. Utility Model Content

[0003] In order to solve the defects of the above-mentioned prior art, the utility model provides a shaft core cooling high-speed rotating seal component. The utility model adopts a gap seal + gas flow guide reflux structure to effectively and reliably solve the discharge of leaked liquid.

[0004] In order to achieve the above technical purpose, the utility model adopts the following technical scheme: a shaft core cooling high-speed rotating seal assembly, including a main shaft, a rear end cover, a connecting rod, and a center rod;

[0005] The rear end cover, the connecting rod and the center rod are provided with a liquid inlet channel and a main liquid return channel. The liquid inlet channel enters from the rear end cover and leads to the main shaft after passing through the center rod and the connecting rod. The main liquid return channel leads to the rear end cover after passing through the main shaft and the connecting rod and the center rod. The main liquid return channel is also connected to a secondary liquid return channel.

[0006] Furthermore, the liquid inlet channel includes a first liquid inlet channel opened in the rear end cover, a second liquid inlet channel opened in the center rod, and a third liquid inlet channel opened in the connecting rod, the third liquid inlet channel has three branch liquid inlet channels, the main shaft has three cooling liquid inlet channels, the first liquid inlet channel, the second liquid inlet channel, and the third liquid inlet channel are connected in sequence, and the third liquid inlet channel is connected to the three cooling liquid inlet channels respectively through the three branch liquid inlet channels; the first liquid inlet channel is connected to a liquid inlet pipe, and the liquid inlet pipe is fixed on the rear end cover.

[0007] Furthermore, the main liquid return channel includes three branch liquid return channels opened in the connecting rod, a first liquid return channel opened in the connecting rod, a second liquid return channel opened in the center rod, a liquid return cavity opened in the rear end cover, and a third channel opened in the rear end cover. The main shaft is provided with three cooling liquid return channels, and the three cooling liquid return channels are respectively connected to the three branch liquid return channels, and the three branch liquid return channels are collectively connected to the first liquid return channel. The first liquid return channel, the second liquid return channel, the liquid return cavity, and the third channel are connected in sequence. The third channel is connected to a main liquid return pipe, and the main liquid return pipe is fixed on the rear end cover.

[0008] Furthermore, a sleeve, a first ring block, and a second ring block are provided on the outer side of the connecting rod, and the sleeve, the first ring block, and the second ring block are fixedly connected and an outer sleeve is provided on the outer side; gaps are left between the sleeve and the first ring block, and between the outer sleeve and the sleeve; the auxiliary liquid return channel includes a first auxiliary channel opened in the second ring block and an auxiliary liquid return cavity opened in the rear end cover, the first auxiliary channel is connected to the gap, the auxiliary liquid return cavity is connected to the first auxiliary channel, the auxiliary liquid return cavity is connected to an auxiliary liquid return pipe, and the auxiliary liquid return pipe is fixed on the rear end cover.

[0009] Furthermore, the outer tube is provided with an air-tight channel, the air-tight channel is connected with an air pipe, and the air pipe is fixed on the rear end cover; an end sealing ring and a rear sealing ring are provided between the outer tube and the sleeve, the end sealing ring is provided with an axial sealing hole, and the rear sealing ring is provided with a radial sealing hole, the axial sealing hole and the radial sealing hole are both connected to the air-tight channel, the axial sealing hole faces the axial surface of the sleeve, and the radial sealing holes face the radial surface of the sleeve.

[0010] In summary, the utility model has achieved the following technical effects:

[0011] The utility model allows the coolant entering and exiting the main shaft smoothly, and the main shaft cooling effect is good;

[0012] The utility model sets a gap to prevent leakage, cooperates with axial and radial air seals to ensure the sealing effect;

[0013] The utility model has a simple structure and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of a shaft core cooling high-speed rotating seal assembly provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0015] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0016] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0017] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0018] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0019] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0021] Example:

[0022] like Figure 1 As shown, a shaft core cooling high-speed rotating seal assembly includes a main shaft 14, a rear end cover 10, a connecting rod 2, and a center rod 3; the main shaft 14, the rear end cover 10, the connecting rod 2, and the center rod 3 are fixedly connected.

[0023] The rear end cover 10, the connecting rod 2 and the center rod 3 are provided with a liquid inlet channel 13 and a main liquid return channel 1. The liquid inlet channel 13 enters from the rear end cover 10 and passes through the center rod 3 and the connecting rod 2 and then leads to the main shaft 14. The main liquid return channel 1 enters from the main shaft 14 and passes through the connecting rod 2 and the center rod 3 and then leads to the rear end cover 10; the main liquid return channel 1 is also connected to a secondary liquid return channel.

[0024] The liquid inlet channel 13 is used to input coolant into the main shaft 14, the main liquid return channel 1 is used for coolant reflux, and the auxiliary liquid return channel is used to intercept the coolant that is intended to leak and then reflux it.

[0025] The liquid inlet channel 13 includes a first liquid inlet channel opened in the rear end cover 10, a second liquid inlet channel opened in the center rod 3, and a third liquid inlet channel opened in the connecting rod 2. The third liquid inlet channel has three branch liquid inlet channels. The main shaft 14 has three cooling liquid inlet channels. The first liquid inlet channel, the second liquid inlet channel, and the third liquid inlet channel are connected in sequence. The third liquid inlet channel is connected to the three cooling liquid inlet channels respectively through the three branch liquid inlet channels; the first liquid inlet channel is connected to the liquid inlet pipe 12, and the liquid inlet pipe 12 is fixed on the rear end cover 10.

[0026] The main liquid return channel 1 includes three branch liquid return channels 102 opened on the connecting rod 2, a first liquid return channel 103 opened on the connecting rod 2, a second liquid return channel 104 opened on the center rod 3, a liquid return cavity 105 opened on the rear end cover 10, and a third channel 106 opened on the rear end cover 10. The main shaft 14 is provided with three cooling liquid return channels 101, and the three cooling liquid return channels 101 are respectively connected to the three branch liquid return channels 102, and the three branch liquid return channels 102 are collectively connected to the first liquid return channel 103. The first liquid return channel 103, the second liquid return channel 104, the liquid return cavity 105, and the third channel 106 are connected in sequence. The third channel 106 is connected to the main liquid return pipe 17, and the main liquid return pipe 17 is fixed on the rear end cover 10.

[0027] The three cooling liquid inlet channels and the three cooling liquid return channels 101 are arranged at staggered intervals to increase the cooling effect.

[0028] The main liquid return channel 1 can return 90% of the coolant and is used as the main return channel.

[0029] The outer side of the connecting rod 2 is provided with a sleeve 4, a first ring block 6, and a second ring block 7. The sleeve 4, the first ring block 6, and the second ring block 7 are fixedly connected and an outer sleeve 5 is provided on the outer side. A gap 18 is left between the sleeve 4 and the first ring block 6, and between the outer sleeve 5 and the sleeve 4. The auxiliary liquid return channel includes a first auxiliary channel 19 provided in the second ring block 7 and an auxiliary liquid return cavity 20 provided in the rear end cover 10. The first auxiliary channel 19 is connected to the gap 18, and the auxiliary liquid return cavity 20 is connected to the first auxiliary channel 19. The auxiliary liquid return cavity 20 is connected to an auxiliary liquid return pipe 21, and the auxiliary liquid return pipe 21 is fixed on the rear end cover 10. The auxiliary liquid return cavity 20 first collects the leaked liquid and then refluxes it through the auxiliary liquid return pipe 21.

[0030] The outer tube 5 is provided with an air-tight channel 501 for air-tight sealing. The air-tight channel 501 is connected with an air pipe 11, and the air pipe 11 is fixed on the rear end cover 10. An end sealing ring 8 and a rear sealing ring 9 are provided between the outer tube 5 and the sleeve 4. The end sealing ring 8 is provided with an axial sealing hole 801, and the rear sealing ring 9 is provided with a radial sealing hole 901. The axial sealing hole 801 and the radial sealing hole 901 are both connected to the air-tight channel 501. The axial sealing hole 801 faces the axial surface of the sleeve 4, and the radial sealing hole 901 faces the radial surface of the sleeve 4. The axial and radial gas sealing ensures that the position of the sleeve 4 will not leak, prevents the leakage of another 10% of liquid, and ensures the sealing effect.

[0031] The utility model allows the cooling liquid to enter the cooling channel through the rear end cover shaft, and then enter the main shaft through the three cooling channels of the connecting rod, and then enter the rear end return liquid cavity through the three return liquid channels of the connecting rod from the main shaft, and be discharged through the return liquid channel; another small amount of about 10% of the leakage liquid is sealed by the radial and axial air sealing structures respectively arranged on the rear sealing ring and the end sealing ring, and enters the leakage liquid cavity through the arranged leakage gap channel, and is then discharged through the dedicated channel, thereby ensuring that the liquid will not leak.

[0032] The above description is only a preferred implementation mode of the present invention, and does not limit the present invention in any form. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are within the scope of the technical solution of the present invention.

Claims

1. A shaft core cooling high-speed rotating seal assembly, characterized in that: It comprises a main shaft (14), a rear end cover (10), a connecting rod (2), and a center rod (3); The rear end cover (10), the connecting rod (2) and the center rod (3) are provided with a liquid inlet channel (13) and a main liquid return channel (1); the liquid inlet channel (13) enters from the rear end cover (10) and passes through the center rod (3) and the connecting rod (2) before leading to the main shaft (14); the main liquid return channel (1) enters from the main shaft (14) and passes through the connecting rod (2) and the center rod (3) before leading to the rear end cover (10); the main liquid return channel (1) is also connected to a secondary liquid return channel.

2. The shaft core cooling high-speed rotating seal assembly according to claim 1, characterized in that: The liquid inlet channel (13) comprises a first liquid inlet channel provided on the rear end cover (10), a second liquid inlet channel provided on the center rod (3), and a third liquid inlet channel provided on the connecting rod (2); the third liquid inlet channel has three branch liquid inlet channels; the main shaft (14) has three cooling liquid inlet channels; the first liquid inlet channel, the second liquid inlet channel, and the third liquid inlet channel are connected in sequence; the third liquid inlet channel is connected to the three cooling liquid inlet channels respectively through the three branch liquid inlet channels; the first liquid inlet channel is connected to a liquid inlet pipe (12); and the liquid inlet pipe (12) is fixed on the rear end cover (10).

3. The shaft core cooling high-speed rotating seal assembly according to claim 1, characterized in that: The main liquid return channel (1) comprises three branch liquid return channels (102) provided on the connecting rod (2), a first liquid return channel (103) provided on the connecting rod (2), a second liquid return channel (104) provided on the center rod (3), a liquid return cavity (105) provided on the rear end cover (10), and a third channel (106) provided on the rear end cover (10). The main shaft (14) is provided with three cooling liquid return channels (101). The three cooling liquid return channels (101) are respectively connected to the three branch liquid return channels (102). The three branch liquid return channels (102) are collectively connected to the first liquid return channel (103). The first liquid return channel (103), the second liquid return channel (104), the liquid return cavity (105), and the third channel (106) are connected in sequence. The third channel (106) is connected to a main liquid return pipe (17). The main liquid return pipe (17) is fixed on the rear end cover (10).

4. The shaft core cooling high-speed rotating seal assembly according to claim 1, characterized in that: A sleeve (4), a first ring block (6) and a second ring block (7) are arranged on the outside of the connecting rod (2); the sleeve (4), the first ring block (6) and the second ring block (7) are fixedly connected and an outer sleeve (5) is arranged on the outside; a gap (18) is left between the sleeve (4) and the first ring block (6), and between the outer sleeve (5) and the sleeve (4); the auxiliary liquid return channel comprises a first auxiliary channel (19) provided in the second ring block (7) and an auxiliary liquid return cavity (20) provided in the rear end cover (10); the first auxiliary channel (19) is communicated with the gap (18), the auxiliary liquid return cavity (20) is communicated with the first auxiliary channel (19), the auxiliary liquid return cavity (20) is connected with an auxiliary liquid return pipe (21), and the auxiliary liquid return pipe (21) is fixed on the rear end cover (10).

5. The shaft core cooling high-speed rotating seal assembly according to claim 4, characterized in that: The outer tube (5) is provided with an air-sealing passage (501), and the air-sealing passage (501) is connected with an air pipe (11), and the air pipe (11) is fixed on the rear end cover (10); an end sealing ring (8) and a rear sealing ring (9) are provided between the outer tube (5) and the sleeve (4), and the end sealing ring (8) is provided with an axial sealing hole (801), and the rear sealing ring (9) is provided with a radial sealing hole (901), and the axial sealing hole (801) and the radial sealing hole (901) are both connected to the air-sealing passage (501), and the axial sealing hole (801) faces the axial surface of the sleeve (4), and the radial sealing hole (901) faces the radial surface of the sleeve (4).

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