Pressurizing cutting device

Abstract

The utility model discloses a pressurized cutting device which comprises a housing and a driving motor arranged on one side of the housing. An output shaft of the driving motor extends into the housing, and a cutter assembly is fixed to the end, extending into the housing, of the output shaft of the driving motor. The cutter assembly is sleeved with a sealing assembly, and an oil seal area and an air supply area are formed between the sealing assembly and the cutter assembly. Two oil seals are arranged in the oil seal area in a spaced mode. The oil injection channel communicated with the gap between the oil seals and the air supply channel communicated with the air supply area are arranged on the sealing assembly, lubricating oil can be added into the gap between the oil seals in real time through the oil injection channel, the lubricating oil can be added without shutdown, the production efficiency is improved, air can be injected into the air supply area through the air supply channel, and the service life of the sealing assembly is prolonged. Therefore, the sealing performance between the cutter assembly and the sealing assembly is guaranteed, and the problem that feed particles are easily accumulated at the sealing position of the cutter assembly and the sealing assembly is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of puffing machines, in particular to a pressurized cutting device. Background Art

[0002] A puffing machine is a commonly used device in the process of pellet feed processing, which is used to discharge the powder material from the discharging device of the puffing machine after shearing, mixing, kneading and extruding. At the same time of discharging, it is cut by a cutting device to form pellet feed of a certain length. At present, the existing pressurized cutting device has the following deficiencies:

[0003] (1) The sealing performance of the cutter rotor is poor, and it is easy to accumulate feed pellets at the sealing part of the cutter rotor after production for a period of time;

[0004] (2) After the lubricant of the seal of the cutter rotor of the existing pressurized cutting device is used up, it cannot be added in time; it is necessary to stop the machine and disassemble it to add lubricant, which is not only inconvenient for use and maintenance, but also affects the production efficiency;

[0005] (3) The cutter head and the cutter carrier of the existing pressurized cutting device are split, and the cutter blade is clamped and connected between the cutter pressing plate and the cutter carrier by bolts. Due to the existence of the bolt mounting holes, the position of the cutter blade can be finely adjusted, which will increase the end jump of the cutter rod shaft when the cutting rotor runs at high speed.

[0006] Therefore, it is necessary to design a pressurized cutting device to solve the above problems. Content of the Utility Model

[0007] The purpose of the utility model is to provide a pressurized cutting device aiming at the deficiencies of the existing pressurized cutting device in the prior art.

[0008] The technical solution of the utility model is: a pressurized cutting device, including a housing and a driving motor arranged on one side of the housing; the output shaft of the driving motor extends into the housing, and a cutter assembly is fixed at one end of the output shaft of the driving motor extending into the housing; a sealing assembly is sleeved on the cutter assembly, and an oil seal area and a gas supplement area are formed between the sealing assembly and the cutter assembly; two oil seals are arranged at intervals in the oil seal area; the sealing assembly is provided with an oil injection channel connecting the gaps between the oil seals and a gas supplement channel connecting the gas supplement area.

[0009] The cutter assembly includes a cutter rod and a cutter head coaxially arranged at the end of the cutter rod; a plurality of cutter blades are evenly distributed along the circumferential direction on the cutter head; the other end of the cutter rod is coaxially sleeved on the output shaft of the driving motor; the cutter head is fixedly connected with the output shaft of the driving motor through a locking screw penetrating the cutter rod and fixed at the end of the cutter rod; the tail end of the cutter rod is locked with the output shaft of the driving motor through a plurality of circumferentially evenly distributed set screws; the sealing assembly is sleeved on the cutter rod.

[0010] The sealing assembly includes a sealing pressure ring and a sealing seat; the sealing pressure ring is fixed on the housing; the sealing seat is fixed on the sealing pressure ring and sleeved on the cutter bar; the oil seal area is arranged on the inner wall of the inner end of the sealing seat corresponding to the sealing pressure ring; the two oil seals are arranged at intervals in the sealing area and are in interference fit with the cutter bar; the oil injection channel includes a first oil injection channel arranged on the sealing seat and communicating with the gap between the two oil seals, a second oil injection channel arranged on the sealing pressure ring with one end communicating with the first oil injection channel, and a third oil injection channel arranged on the housing with one end communicating with the other end of the second oil injection channel; a sealing adapter is arranged at the other end of the third oil injection channel.

[0011] The air supplement area is arranged on the inner wall of the outer end of the sealing seat; the air supplement channel includes a first air supplement channel arranged on the sealing seat and communicating with the air supplement area, a second air supplement channel arranged on the sealing pressure ring with one end communicating with the first air supplement channel, and a third air supplement channel arranged on the housing with one end communicating with the other end of the second air supplement channel; a threaded pipe joint is arranged at the other end of the third air supplement channel.

[0012] A first sealing ring is arranged between the sealing pressure ring and the housing.

[0013] Second sealing rings are arranged at the connection between the second oil injection channel and the first oil injection channel and at the connection between the second oil injection channel and the third oil injection channel.

[0014] Third sealing rings are arranged at the connection between the second air supplement channel and the first air supplement channel and at the connection between the second air supplement channel and the third air supplement channel.

[0015] A number of mounting blocks are evenly distributed along the circumference at the edge of the cutter disc; the mounting blocks and the cutter disc are of an integral structure; the bottom surface of the mounting block is inclined; a mounting groove is arranged on the bottom surface of the mounting block; the cutter blade is arranged in the mounting groove and is pressed in the mounting groove by a pressing plate.

[0016] Two positioning protrusions are symmetrically arranged in the mounting groove; positioning holes for positioning with the two positioning protrusions are arranged on the cutter blade.

[0017] Adopting the above technical solution, the utility model has the following beneficial effects: (1) A sealing component is arranged on the cutting tool assembly of the utility model, and an oil seal area and an air supplement area are arranged on the sealing component. Two oil seals are arranged at intervals in the oil seal area. At the same time, an oil injection channel communicating with the gap between the oil seals and an air supplement channel communicating with the air supplement area are arranged on the sealing component. Through the oil injection channel, lubricating oil can be added to the gap between the oil seals in real time without stopping the machine to add lubricating oil, improving production efficiency. Through the air supplement channel, air can be injected into the air supplement area, thereby ensuring the sealing performance between the cutting tool assembly and the sealing component and avoiding the problem that feed particles are likely to accumulate at the sealing part between the cutting tool assembly and the sealing component.

[0018] (2) The cutting tool assembly of the utility model comprises a cutting tool rod and a cutting tool disc. The cutting tool disc is fixedly connected with the output shaft of the driving motor through a locking screw penetrating through the cutting tool rod. The tail end of the cutting tool rod is locked with the output shaft of the driving motor through a plurality of circumferentially evenly distributed set screws, thereby ensuring the coaxiality between the cutting tool disc and the cutting tool rod, ensuring that the runout of the cutting tool disc and the cutting tool rod is controlled within a certain range, and ensuring the cutting accuracy.

[0019] (3) The sealing component of the utility model comprises a sealing pressing ring and a sealing seat, which is not only convenient for the installation of the sealing seat, but also convenient for the arrangement of the air supplement channel and the oil injection channel.

[0020] (4) The utility model is provided with a first sealing ring to ensure the sealing performance between the sealing pressing ring and the housing.

[0021] (5) The utility model is provided with a second sealing ring to ensure the sealing performance between the oil injection channels.

[0022] (6) The utility model is provided with a third sealing ring to ensure the sealing performance between the air supplement channels.

[0023] (7) The utility model is provided with an installation groove on the installation block for facilitating the installation of the cutting blade, and the installation block and the cutting tool disc are of an integral structure, which can further reduce the runout during the high-speed rotation of the cutting tool assembly.

[0024] (8) The utility model is provided with positioning protrusions in the installation groove and positioning holes on the cutting blade for facilitating the positioning and installation of the cutting blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to make the content of the utility model be more clearly understood, the following further detailed description of the utility model is given according to specific embodiments in conjunction with the drawings.

[0026] Figure 1 It is a structural schematic diagram of the utility model.

[0027] Figure 2 isFigure 1 Enlarged view of area A

[0028] Figure 3 Structural schematic diagram of the cutter assembly of the present utility model

[0029] Figure 4 Structural schematic diagram of the cooperation between the cutter assembly of the present utility model and the driving motor disc

[0030] The reference numerals in the drawings are as follows

[0031] Housing 1, driving motor 2, cutter assembly 3, cutter bar 3-1, cutter disc 3-2, cutter blade 3-3, mounting block 3-4, pressing plate 3-5, positioning protrusion 3-6, set screw 3-7, sealing assembly 4, sealing pressure ring 4-1, sealing seat 4-2, oil seal area 5, air supplement area 6, oil seal 7, oil injection channel 8, first oil injection channel 8-1, second oil injection channel 8-2, third oil injection channel 8-3, sealing adapter 8-4, air supplement channel 9, first air supplement channel 9-1, second air supplement channel 9-2, third air supplement channel 9-3, threaded pipe joint 9-4, first sealing ring 10, second sealing ring 11, third sealing ring 12 Specific embodiments

[0032] (Embodiment 1)

[0033] See Figures 1 to 4 , a pressure cutting device in this embodiment includes a housing 1 and a driving motor 2 provided on one side of the housing 1. The driving motor 2 preferably adopts a frequency conversion motor; the output shaft of the driving motor 2 extends into the housing 1, and a cutter assembly 3 is fixed to one end of the output shaft of the driving motor 2 extending into the housing 1; a sealing assembly 4 is sleeved on the cutter assembly 3, and an oil seal area 5 and an air supplement area 6 are formed between the sealing assembly 4 and the cutter assembly 3; two oil seals 7 are arranged at intervals in the oil seal area 5; an oil injection channel 8 communicating with the gap between the connected oil seals 7 and an air supplement channel 9 communicating with the air supplement area 6 are provided on the sealing assembly 4

[0034] Further, the cutter assembly 3 includes a cutter rod 3-1 and a cutter disc 3-2 coaxially arranged at the end of the cutter rod 3-1; a plurality of cutter blades 3-3 are circumferentially and uniformly distributed on the cutter disc 3-2; the other end of the cutter rod 3-1 is coaxially sleeved on the output shaft of the driving motor 2; the cutter disc 3-2 is fixedly connected to the output shaft of the driving motor 2 through a locking screw passing through the cutter rod 3-1 and is fixed at the end of the cutter rod 3-1, and the tail end of the cutter rod 3-1 is locked with the output shaft of the driving motor 2 through a plurality of set screws 3-7 circumferentially and uniformly distributed; to ensure the coaxiality between the cutter disc 3-2 and the cutter rod 3-1, ensure that the runout of the cutter disc 3-2 and the cutter rod 3-1 is controlled within a certain range, ensure the cutting accuracy, and at the same time can also improve the service life of the oil seal and improve the sealing performance; the sealing assembly 4 is sleeved on the cutter rod 3-1.

[0035] Further, for the convenience of installing the seal seat 4-2 and the setting of the oil injection channel 8 and the air supplement channel 9, the sealing assembly 4 includes a seal pressing ring 4-1 and a seal seat 4-2; the seal pressing ring 4-1 is fixed on the housing 1; the seal seat 4-2 is fixed on the seal pressing ring 4-1 and is sleeved on the cutter rod 3-1; the oil seal area 5 is arranged on the inner wall of the inner end of the seal seat 4-2 corresponding to the seal pressing ring 4-1; the two oil seals 7 are spaced in the seal area and are in interference fit with the cutter rod 3-1; the oil injection channel 8 includes a first oil injection channel 8-1 arranged on the seal seat 4-2 and communicating with the gap between the two oil seals 7, a second oil injection channel 8-2 arranged on the seal pressing ring 4-1 and having one end communicating with the first oil injection channel 8-1, and a third oil injection channel 8-3 arranged on the housing 1 and having one end communicating with the other end of the second oil injection channel 8-2; a seal adapter 8-4 is arranged at the other end of the third oil injection channel 8-3.

[0036] Further, for the convenience of ventilating the air supplement area 6, the air supplement area 6 is arranged on the inner wall of the outer end of the seal seat 4-2; the air supplement channel 9 includes a first air supplement channel 9-1 arranged on the seal seat 4-2 and communicating with the air supplement area 6, a second air supplement channel 9-2 arranged on the seal pressing ring 4-1 and having one end communicating with the first air supplement channel 9-1, and a third air supplement channel 9-3 arranged on the housing 1 and having one end communicating with the other end of the second air supplement channel 9-2; a threaded pipe joint 9-4 is arranged at the other end of the third air supplement channel 9-3.

[0037] Further, to ensure the sealing performance between the seal pressing ring 4-1 and the housing 1, a first sealing ring 10 is arranged between the seal pressing ring 4-1 and the housing 1.

[0038] Furthermore, in order to ensure the sealing between the oil injection channels 8, a second sealing ring 11 is provided at the connection point between the second oil injection channel 8-2 and the first oil injection channel 8-1 and at the connection point between the second oil injection channel 8-2 and the third oil injection channel 8-3.

[0039] Furthermore, in order to ensure the sealing between the air supply channels 9, a third sealing ring 12 is provided at the connection between the second air supply channel 9-2 and the first air supply channel 9-1 and at the connection between the second air supply channel 9-2 and the third air supply channel 9-3.

[0040] Furthermore, in order to facilitate the installation of the cutting blade 3-3, a plurality of mounting blocks 3-4 are evenly distributed along the circumferential direction on the edge of the cutting disc 3-2; the mounting blocks 3-4 and the cutting disc 3-2 are an integrated structure, which further reduces the vibration of the cutting rod 3-1 during high-speed rotation; the bottom surface of the mounting block 3-4 is inclined; the bottom surface of the mounting block 3-4 is provided with a mounting groove; the cutting blade 3-3 is arranged in the mounting groove and is pressed in the mounting groove by a pressure plate 3-5.

[0041] Furthermore, in order to facilitate the positioning of the cutting blade 3-3 during installation, two positioning protrusions 3-6 are symmetrically provided in the installation groove; and the cutting blade 3-3 is provided with positioning holes that are positioned with the two positioning protrusions 3-6.

[0042] The pressurized cutting device of this embodiment is provided with a sealing component 4 on the cutter component 3, and an oil seal area 5 and an air replenishing area 6 are provided on the sealing component 4, and two oil seals 7 are provided at intervals in the oil seal area 5. At the same time, an oil injection channel 8 connected to the gap between the oil seals 7 and an air replenishing channel 9 connected to the air replenishing area 6 are provided on the sealing component 4. Lubricating oil can be added to the gap between the oil seals 7 in real time through the oil injection channel 8, and there is no need to stop the machine to add lubricating oil, thereby improving production efficiency. Air can be injected into the air replenishing area 6 through the air replenishing channel 9, thereby ensuring the sealing between the cutter component 3 and the sealing component 4, and avoiding the problem of easy accumulation of feed particles at the sealing portion of the cutter component 3 and the sealing component 4.

[0043] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pressure cutting device, characterized in that: The invention comprises a housing (1) and a driving motor (2) arranged on one side of the housing (1); the output shaft of the driving motor (2) extends into the housing (1), and a cutter assembly (3) is fixed to one end of the output shaft of the driving motor (2) extending into the housing (1); a sealing assembly (4) is sleeved on the cutter assembly (3), and an oil seal area (5) and an air supply area (6) are formed between the sealing assembly (4) and the cutter assembly (3); two oil seals (7) are arranged in the oil seal area (5) at intervals; and an oil injection channel (8) communicating with the gap between the oil seals (7) and an air supply channel (9) communicating with the air supply area (6) are provided on the sealing assembly (4).

2. A pressurized cutting device according to claim 1, characterized in that: The cutter assembly (3) comprises a cutter rod (3-1) and a cutter disc (3-2) coaxially arranged at the end of the cutter rod (3-1); a plurality of cutter blades (3-3) are evenly distributed on the cutter disc (3-2) along the circumferential direction; the other end of the cutter rod (3-1) is coaxially sleeved on the output shaft of the drive motor (2); the cutter disc (3-2) is fixedly connected to the output shaft of the drive motor (2) by passing through the cutter rod (3-1) through a locking screw, and then fixed to the end of the cutter rod (3-1); the tail end of the cutter rod (3-1) is locked with the output shaft of the drive motor (2) by a plurality of set screws (3-7) evenly distributed along the circumferential direction; and the sealing assembly (4) is sleeved on the cutter rod (3-1).

3. A pressurized cutting device according to claim 2, characterized in that: The sealing assembly (4) comprises a sealing pressure ring (4-1) and a sealing seat (4-2); the sealing pressure ring (4-1) is fixed on the housing (1); the sealing seat (4-2) is fixed on the sealing pressure ring (4-1), and the sealing seat (4-2) is sleeved on the cutting rod (3-1); the oil seal area (5) is arranged on the inner wall of the inner end of the sealing seat (4-2) corresponding to the sealing pressure ring (4-1); the two oil seals (7) are arranged in the sealing area at intervals, and the two oil seals (7) are in contact with the cutting rod (3-1). -1) interference fit; the oil injection channel (8) comprises a first oil injection channel (8-1) provided on the sealing seat (4-2) and connected to the gap between the two oil seals (7), a second oil injection channel (8-2) provided on the sealing pressure ring (4-1) and connected to the first oil injection channel (8-1) at one end, and a third oil injection channel (8-3) provided on the cover (1) and connected to the other end of the second oil injection channel (8-2); the other end of the third oil injection channel (8-3) is provided with a sealing adapter (8-4).

4. A pressurized cutting device according to claim 3, characterized in that: The air replenishment area (6) is arranged on the inner wall of the outer end of the sealing seat (4-2); the air replenishment channel (9) comprises a first air replenishment channel (9-1) arranged on the sealing seat (4-2) and connected to the air replenishment area (6), a second air replenishment channel (9-2) arranged on the sealing pressure ring (4-1) and connected to the first air replenishment channel (9-1) at one end, and a third air replenishment channel (9-3) arranged on the cover shell (1) and connected to the other end of the second air replenishment channel (9-2); the other end of the third air replenishment channel (9-3) is provided with a threaded pipe joint (9-4).

5. A pressurized cutting device according to claim 3, characterized in that: A first sealing ring (10) is provided between the sealing pressure ring (4-1) and the housing (1).

6. A pressurized cutting device according to claim 3, characterized in that: A second sealing ring (11) is provided at the connection point between the second oil injection channel (8-2) and the first oil injection channel (8-1) and at the connection point between the second oil injection channel (8-2) and the third oil injection channel (8-3).

7. A pressurized cutting device according to claim 4, characterized in that: A third sealing ring (12) is provided at the connection point between the second air supply channel (9-2) and the first air supply channel (9-1) and at the connection point between the second air supply channel (9-2) and the third air supply channel (9-3).

8. A pressurized cutting device according to claim 2, characterized in that: The edge of the cutting disc (3-2) is evenly distributed with a plurality of mounting blocks (3-4) along the circumferential direction; the mounting blocks (3-4) and the cutting disc (3-2) are an integrated structure; the bottom surface of the mounting block (3-4) is arranged at an angle; the bottom surface of the mounting block (3-4) is provided with a mounting groove; the cutting blade (3-3) is arranged in the mounting groove and is pressed in the mounting groove by a pressing plate (3-5).

9. A pressurized cutting device according to claim 8, characterized in that: Two positioning protrusions (3-6) are symmetrically arranged in the installation groove; and a positioning hole for positioning with the two positioning protrusions (3-6) is arranged on the cutting blade (3-3).

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