Steam centrifugal separator and rotor thereof

Abstract

The utility model provides a steam centrifugal separator and a rotor thereof, the rotor comprises a main shaft and a first impeller, and the first impeller comprises a first blade and a first supporting plate; the number of the first blades is multiple, the multiple first blades are evenly arranged in the circumferential direction of the main shaft and extend in the radial direction of the main shaft, and the first supporting plates are arranged between the adjacent first blades and play a role in supporting and connecting the adjacent first blades; the thickness of each first blade ranges from 15 mm to 20 mm. According to the rotor for the steam centrifugal separator, the problems that in a conventional technical scheme, rotor blades are prone to cracking, poor in abrasion resistance and short in service life are solved, localization can be achieved, the domestic blank is filled up, the failure rate of equipment can be reduced, and the maintenance cost can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of papermaking equipment, and in particular to a steam centrifugal separator and a rotor thereof. Background Art

[0002] In the papermaking industry, chemical-mechanical pulp (a type of pulp) is mainly made through chemical pretreatment and high-concentration refining. A large amount of steam is generated during the high-concentration refining process. The mixture of steam and pulp is not conducive to the subsequent bleaching process, so the steam and pulp are separated before bleaching. The key equipment for pulp-steam separation is the steam centrifuge. The steam centrifuge mainly separates fibers and steam through the centrifugal force of the rotor rotation, but due to the high-speed rotation of the rotor, the load is high and it is prone to cavitation cracking, so the equipment has always been imported. Imported equipment has a long delivery cycle, is expensive, and has a high failure rate. Utility Model Content

[0003] According to a first aspect of an embodiment of the present application, there is provided a rotor for a steam centrifuge, the rotor comprising a main shaft and a first impeller, the first impeller comprising first blades and a first support plate; there are a plurality of first blades, the plurality of first blades are evenly arranged along the circumference of the main shaft and extend radially toward the main shaft, the first support plate is arranged between adjacent first blades, and plays a role in supporting and connecting adjacent first blades; wherein the thickness of each first blade is 15-20 mm.

[0004] In some embodiments, the thickness of each of the first blades is 16-18 mm.

[0005] In some embodiments, the number of the first support plates is the same as the number of the first blades, and the plurality of first support plates are located in the same plane in the circumferential direction of the main shaft to form a first support ring.

[0006] In some embodiments, the number of the first support plates is twice the number of the first blades, two first support plates arranged parallel to each other are arranged between adjacent first blades, and multiple first support plates are located in two planes circumferentially of the main shaft to form a first support ring and a second support ring.

[0007] In some embodiments, the rotor also includes a second impeller, which is connected to the main shaft and spaced apart from the first impeller; the second impeller includes second blades and a second support plate; there are multiple second blades, and the multiple second blades are evenly arranged along the circumference of the main shaft and extend radially toward the main shaft, and the second support plate is arranged between adjacent second blades to support and connect adjacent second blades; wherein the thickness of each second blade is 15-20 mm.

[0008] In some embodiments, the number of the second support plates is the same as the number of the second blades, and the plurality of second support plates are located in the same plane in the circumferential direction of the main shaft to form a third support ring.

[0009] In some embodiments, the number of the first blades is 12, and the angle between adjacent first blades is 30 degrees.

[0010] In some embodiments, a side of each of the first support plates and each of the second support plates facing the main axis is an arc structure.

[0011] In a second aspect, an embodiment of the present application provides a steam centrifuge, comprising a shell, a partition plate, and the rotor described in the above embodiment, wherein the shell is formed with a accommodating chamber, and the first impeller and the second impeller of the rotor are arranged in the accommodating chamber for pulp-steam separation of papermaking pulp in the accommodating chamber, the partition plate is arranged between the first impeller and the second impeller, and divides the accommodating chamber of the shell into a pulp chamber and a steam chamber, the first impeller is located in the pulp chamber, and the second impeller is located in the steam chamber.

[0012] In some embodiments, the partition plate is fixedly connected to the inner wall of the shell by a locking tongue, and the partition plate is provided with a mounting groove; the locking tongue includes a screw and a tongue cap, the screw is inserted in the mounting groove, the tongue cap is exposed from the mounting groove and inserted in the matching groove of the inner wall of the shell, a rubber ring is provided around the side of the tongue cap, and the rubber ring is clamped between the tongue cap and the inner wall of the mounting groove of the partition plate.

[0013] The rotor for a steam centrifuge provided in the embodiment of the present application solves the problems of easy cracking, poor wear resistance and short service life of rotor blades in conventional technical solutions, and at the same time can be domestically produced, filling a domestic gap, reducing the failure rate of equipment and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 It is a front view structural schematic diagram of an embodiment of a rotor for a steam centrifugal separator of the present application;

[0016] Figure 2 yes Figure 1A schematic side view of the structure of the rotor in the embodiment;

[0017] Figure 3 It is a schematic cross-sectional view of the structure of an embodiment of the steam centrifugal separator of the present application;

[0018] Figure 4 Schematic diagram of the structure of the partition plate in this embodiment;

[0019] Figure 5 It is a structural schematic diagram of the lock tongue in this embodiment. DETAILED DESCRIPTION

[0020] The present application is further described in detail below in conjunction with the accompanying drawings and examples. It is particularly noted that the following examples are only used to illustrate the present application, but are not intended to limit the scope of the present application. Similarly, the following examples are only some embodiments of the present application rather than all embodiments, and all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0021] The terms "first", "second", and "third" in the embodiments of the present application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", and "third" can expressly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the embodiments of the present application, all directional indications (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. The terms "including" and "having" in the embodiments of the present application and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or components inherent to these processes, methods, products, or devices.

[0022] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0023] Please also read Figure 1 and Figure 2 , Figure 1 1 is a front view of a rotor for a steam centrifuge according to an embodiment of the present invention. Figure 2 yes Figure 1 The side view of the rotor in the embodiment; it should be noted that the rotor in the present application is used in a steam centrifuge, which mainly separates fibers from steam by centrifugal force generated by the rotation of the rotor. The rotor 10 includes a main shaft 300 and a first impeller 100.

[0024] Specifically, the first impeller 100 includes a first blade 110 and a first support plate 120; the number of the first blades 110 is multiple, and the multiple first blades 110 are evenly arranged along the circumference of the main shaft 300 and extend radially toward the main shaft 300, and the first support plate 120 is arranged between adjacent first blades 110 to support and connect adjacent first blades 110; wherein, the thickness T of each first blade 110 is 15-20mm, and optionally, in some embodiments, the thickness of each first blade 110 may be 16-18mm, for example, specific values ​​such as 16mm, 16.5mm, 17mm, 18mm, etc. are not listed here. Among them, the number of first blades 110 in this embodiment is 12, and the angle a between adjacent first blades 110 is 30 degrees.

[0025] Optionally, the number of first support plates 120 in this embodiment is the same as the number of first blades 110, a first support plate 120 is provided between each two adjacent first blades 110, and multiple first support plates 120 are located in the same plane of the main shaft circumference to form a first support ring 1210.

[0026] Optionally, the number of first support plates 120 in this embodiment can be twice the number of first blades 110, that is, two first support plates 120 are provided between every two adjacent first blades 110, and two first support plates 120 arranged parallel to each other are provided between adjacent first blades 110. The multiple first support plates 120 are located in two circumferential planes of the main shaft 300, and form a first support ring 1210 and a second support ring 1220.

[0027] Optionally, see Figure 2The rotor 10 in this embodiment further includes a second impeller 200, which is connected to the main shaft 300 and is spaced apart from the first impeller 100. The second impeller 200 includes a second blade 210 and a second support plate 220; the number of the second blades 210 is multiple, and the multiple second blades 210 are evenly arranged along the circumference of the main shaft 300 and extend radially toward the main shaft 300. The second support plate 220 is arranged between adjacent second blades 210 to support and connect adjacent second blades 210; the thickness of each second blade 210 is 15-20 mm, and optionally, in some embodiments, the thickness of each second blade 210 may be 16-18 mm, for example, specific values ​​such as 16 mm, 16.5 mm, 17 mm, and 18 mm are not listed here.

[0028] Optionally, the number of the second support plates 220 in this embodiment is the same as the number of the second blades 210, and a plurality of the second support plates 220 are located in the same plane in the circumferential direction of the main shaft 300, and form a third support ring 2210. The number of the second blades 210 and the angle between adjacent second blades 210 may be the same as the corresponding structure of the first blades 110 of the first impeller 100, for example, the number may be 12, and the angle between adjacent blades is 30 degrees.

[0029] Optionally, each first support plate 120 and each second support plate 220 has an arc structure on one side facing the main shaft 300 (marked 100a in the figure), and the inner edge of the support plate is designed to be an arc chamfer to reduce the risk of slurry hanging.

[0030] The rotor in the embodiment of the present application can improve the blade strength by making the blade thickness 15-20mm. This solves the problems of easy cracking, poor wear resistance and short service life of the rotor blades in the conventional technical solution. At the same time, it can achieve localization, fill the domestic gap, reduce the failure rate of equipment, and reduce maintenance costs. The service life of the rotor is increased from about 1.5 years in the conventional solution to 4 to 5 years, which can extend the life by more than double.

[0031] In addition, the present application also provides a steam centrifugal separator, see Figure 3 , Figure 31 is a schematic structural cross-sectional view of an embodiment of a steam centrifugal separator of the present application, wherein the steam centrifugal separator in this embodiment comprises a housing 20, a partition plate 30 and a rotor 10, wherein the structure of the rotor 10 can refer to the relevant description of the aforementioned embodiment, the housing 20 is formed with a accommodating chamber 2001, the first impeller 100 and the second impeller 200 of the rotor 10 are arranged in the accommodating chamber 2001, so as to perform pulp-steam separation on the papermaking pulp in the accommodating chamber 2001, the partition plate 30 is arranged between the first impeller 100 and the second impeller 200, and divides the accommodating chamber 2001 of the housing into a pulp chamber 2001a and a steam chamber 2001b, the first impeller 100 is located in the pulp chamber 2001a, and the second impeller 200 is located in the steam chamber 2001b.

[0032] Among them, the main shaft 300 of the rotor 10 is used to connect with an external driving component, such as a motor, etc. The detailed features of this part are within the scope of understanding of those skilled in the art and are not specifically introduced here.

[0033] Optionally, the partition plate 30 in this embodiment is fixedly connected to the inner wall of the housing 20 via a locking tongue 40. Figure 4 , Figure 4 3 is a schematic diagram of the structure of the partition plate in this embodiment, wherein the partition plate 30 is provided with a mounting groove 301 , the mounting groove 301 is used to mount the lock tongue 40 , and the shape of the mounting groove 301 is adapted to the lock tongue 40 .

[0034] Please also read Figure 3 and Figure 5 , Figure 5 : is a schematic diagram of the structure of the lock tongue in this embodiment, wherein the lock tongue 40 in this embodiment includes a screw 41 and a tongue cap 42, wherein the screw 41 is inserted into the mounting groove 301 of the partition 30, the tongue cap 42 is exposed from the mounting groove 301 and inserted into the matching groove 21 of the inner wall of the housing 20, and a rubber ring 43 is provided around the side of the tongue cap 42, and the rubber ring 43 is sandwiched between the tongue cap 42 and the inner wall of the mounting groove 301 of the partition 30. The number of the lock tongues 40 can be multiple, for example, 6, and after the rotor 10 is installed, the lock tongue 40 is pushed out and inserted into the matching groove 21 of the inner wall of the housing 20. The rotor 10 is connected to the housing 20 as a whole. A groove is opened around the tongue cap 42 of each lock tongue 40 and a rubber O-ring (rubber ring 43) is added. The rubber O-ring prevents the locking tongue 40 between the rotor 10 and the housing 20 from getting stuck, making it easier to disassemble the rotor 10 from the housing 20, reducing the disassembly time, and eliminating destructive disassembly, reducing maintenance costs. In the conventional technical solution, it originally took 4 hours to disassemble and separate the rotor from the housing, while the improved solution of the present application only takes about 30 minutes, greatly improving the efficiency of disassembly and maintenance.

[0035] The above descriptions are only some embodiments of the present application, and do not limit the protection scope of the present application. Any equivalent device or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A rotor for a steam centrifuge, characterized in that: The rotor includes a main shaft and a first impeller, the first impeller includes first blades and a first support plate; there are multiple first blades, the multiple first blades are evenly arranged along the circumference of the main shaft and extend radially toward the main shaft, the first support plate is arranged between adjacent first blades, and plays a role in supporting and connecting adjacent first blades; wherein the thickness of each first blade is 15-20mm.

2. The rotor according to claim 1, characterized in that The thickness of each of the first blades is 16-18 mm.

3. The rotor according to claim 1, characterized in that The number of the first support plates is the same as the number of the first blades. The plurality of first support plates are located in the same plane in the circumferential direction of the main shaft and form a first support ring.

4. The rotor according to claim 1, characterized in that The number of the first support plates is twice the number of the first blades, and two first support plates arranged parallel to each other are arranged between adjacent first blades. Multiple first support plates are located in two planes circumferentially of the main shaft to form a first support ring and a second support ring.

5. The rotor according to claim 1, characterized in that The rotor also includes a second impeller, which is connected to the main shaft and spaced apart from the first impeller; the second impeller includes second blades and a second support plate; there are multiple second blades, which are evenly arranged along the circumference of the main shaft and extend radially toward the main shaft, and the second support plate is arranged between adjacent second blades to support and connect adjacent second blades; wherein the thickness of each second blade is 15-20 mm.

6. The rotor according to claim 5, characterized in that The number of the second support plates is the same as the number of the second blades. The plurality of second support plates are located in the same plane in the circumferential direction of the main shaft and form a third support ring.

7. The rotor according to any one of claims 1 to 6, characterized in that: The number of the first blades is 12, and the angle between adjacent first blades is 30 degrees.

8. The rotor according to claim 5, characterized in that A side of each of the first supporting plates and each of the second supporting plates facing the main axis is an arc structure.

9. A steam centrifugal separator, characterized in that: The steam centrifuge comprises a shell, a partition plate and the rotor according to any one of claims 5 to 8, the shell is formed with a accommodating chamber, the first impeller and the second impeller of the rotor are arranged in the accommodating chamber, so as to perform pulp-steam separation on the papermaking pulp in the accommodating chamber, the partition plate is arranged between the first impeller and the second impeller, and divides the accommodating chamber of the shell into a pulp chamber and a steam chamber, the first impeller is located in the pulp chamber, and the second impeller is located in the steam chamber.

10. The steam centrifugal separator according to claim 9, characterized in that: The partition plate is fixedly connected to the inner wall of the shell by a locking tongue, and the partition plate is provided with a mounting groove; the locking tongue comprises a screw and a tongue cap, the screw is inserted in the mounting groove, the tongue cap is exposed from the mounting groove and inserted in the matching groove of the inner wall of the shell, a rubber ring is provided around the side of the tongue cap, and the rubber ring is clamped between the tongue cap and the inner wall of the mounting groove of the partition plate.

Images