Novel centrifugal machine integrated cast steel bearing chamber

Abstract

A front connecting ring seat and a rear connecting ring seat are arranged at the front end and the rear end of a bearing chamber body respectively, a front boss arranged on the inner side of the front connecting ring seat is further arranged at the front side end of the bearing chamber body, and an oil injection connector arranged on the periphery of the top of the rear connecting ring seat is formed in the rear side end of the bearing chamber body. An assembling through opening is formed in the axis position of the bearing chamber body, an outer-layer oil cavity and an inner-layer oil cavity which are communicated with the assembling through opening are formed in the bearing chamber body, and the inner-layer oil cavity is communicated with the oil injection connector. The main shaft is installed in the assembling through opening through the front bearing and the rear bearing, the front sealing piece is fixedly installed on the front boss and keeps sealing fit with the front side end of the main shaft, the rear sealing piece is fixedly installed on the rear connecting ring base, and the assembling shaft sleeve is arranged on the periphery of the main shaft in a sleeving mode and rotationally installed in the assembling through opening. And the inner-layer oil cavity is arranged on the periphery of the assembly shaft sleeve. According to the scheme, the technical level and the technical performance of products can be improved, the manufacturing cost is reduced, and the product competitiveness is comprehensively improved.

Description

Technical Field

[0001] This utility model relates to the technical field of bearing housings for centrifuges, specifically a novel integrated cast steel bearing housing for centrifuges. Background Technology

[0002] The HR500-N centrifuge is currently the most widely used and consumed two-stage piston pusher centrifuge, with an annual domestic production of approximately 1,000 units. With the continuous advancement of energy conservation and carbon reduction, and the ongoing expansion of the breadth and depth of the separation and refining of non-ferrous metal salts such as nickel, cobalt, manganese, and lithium in the new energy field, the market prospects for this type of small and medium-sized two-stage piston pusher centrifuge are even more promising.

[0003] Please see Figure 1 In the existing assembly scheme of the HR500-N centrifuge, the front and rear bearing support structures of its main shaft are a double-combination structure with welded bearing housings containing cast steel bearing chambers. This type of support structure is relatively complex, with many mating surfaces and relatively poor stability. Assembling and welding it presents technical challenges such as a large welding workload, high manufacturing costs, and long production cycles. Furthermore, the large size of this welded bearing housing results in its heavy weight, further complicating the welding and assembly process.

[0004] In addition, due to the complex structure and the many mating surfaces involved in the assembly of various components, there are many leakage points in the high-pressure oil circuit, which can easily lead to problems such as oil leakage and pressure loss during wiring, thus affecting the technical performance of the centrifuge.

[0005] In order to optimize the centrifuge structural design, improve the product's technical level, enhance its technical performance, reduce manufacturing costs, and comprehensively improve the product's competitiveness, the following technical solution for a new type of centrifuge with an integrated cast steel bearing chamber is provided. Utility Model Content

[0006] In view of the above-mentioned shortcomings in the existing technology, the purpose of this utility model is to provide a new type of integrated cast steel bearing chamber for centrifuges, which improves the product's technical level and performance, reduces manufacturing costs, and comprehensively enhances the product's competitiveness.

[0007] The technical solution adopted by this utility model to achieve the above objectives is as follows: a novel integrated cast steel bearing housing for centrifuges, comprising an integrated cast steel bearing housing body, with a front connecting ring seat and a rear connecting ring seat respectively provided at the front and rear ends of the bearing housing body, a front boss arranged inside the front connecting ring seat at the front end of the bearing housing body, an oil injection port arranged around the top of the rear connecting ring seat at the rear end of the bearing housing body, an assembly port at the shaft center of the bearing housing body, and an outer oil cavity and an inner oil cavity inside the bearing housing body that are connected to the assembly port, the inner oil cavity being connected to the oil injection port.

[0008] The bearing housing body is equipped with a main shaft, a front seal, a rear seal, and an assembly bushing. The front and rear ends of the assembly port are respectively equipped with a front bearing and a rear bearing. The main shaft is rotatably mounted in the assembly port through the front and rear bearings. The front seal is fixedly mounted on the front boss and maintains a sealing fit with the front end of the main shaft. The rear seal is fixedly mounted on the rear connecting ring seat. The assembly bushing is sleeved around the main shaft and rotatably mounted in the assembly port. The inner oil cavity is arranged around the assembly bushing.

[0009] Based on the above technical solution, in order to ensure that the high-pressure oil flowing into the inner side of the front connecting ring seat can circulate and quickly carry away the heat generated by the main shaft and rotor components, an oil drain port is provided at the bottom of the front connecting ring seat.

[0010] Based on the above technical solution, in order to ensure that the integrated cast steel bearing chamber can be stably installed on the centrifuge housing structure, and to ensure that the high-pressure oil flowing in the annular oil chamber on the drive motor side can be quickly discharged to achieve rapid heat removal, an assembly base is provided at the bottom of the bearing chamber body. Based on the above technical solution, in order to ensure that the high-pressure oil in the inner oil chamber can be effectively transported to the inside of the spindle and efficiently dissipated, the following technical solution is provided.

[0011] A heat dissipation cavity is provided at the center of the spindle, an annular groove is provided on the inner wall of the assembly bushing, and radially distributed connecting holes are provided evenly on the assembly bushing. The connecting holes are in communication with the inner oil cavity and the annular groove. An oil inlet is provided on the side wall of the spindle and arranged inside the annular groove. The oil inlet is in communication with the heat dissipation cavity and the annular groove.

[0012] Based on the above technical solution, in order to ensure that the high-pressure oil flowing in the spindle heat dissipation cavity can be input into the outer oil cavity so as to quickly remove the heat accumulated on the outside of the spindle, an oil drain port is provided on the side wall of the spindle, and the oil drain port is connected to the heat dissipation cavity and the outer oil cavity.

[0013] Based on the above technical solution, in order to ensure that the high-pressure oil flowing in the inner oil cavity, outer oil cavity and heat dissipation cavity in the main shaft can achieve circulation, an oil outlet is provided at the bottom of the bearing chamber body, and the oil outlet is connected to the outer oil cavity.

[0014] The beneficial effects of this utility model are as follows: Compared with the traditional welded bearing housing with a double-combination structure of cast steel bearing housing, the improved integrated cast steel bearing housing has the following advantages:

[0015] The integrated cast steel bearing housing structure is effectively simplified, making its dimensions more compact. This significantly improves the assembly precision of each component, virtually eliminating oil leakage and pressure drop issues caused by poor assembly, thus enabling the centrifuge to achieve better product performance. Furthermore, the elimination of the need for an additional bearing housing and the removal of welding work between the bearing housing structure and the bearing chamber simplifies assembly, reduces production cycle and manufacturing costs, and comprehensively enhances product competitiveness. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the existing assembly scheme, showing the combination of the bearing housing, bearing chamber, and main shaft.

[0017] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 3 For Figure 2 Based on this, a schematic diagram of the cross-sectional structure along line AA of the main body of the bearing housing;

[0019] Figure 4 for Figure 2 Enlarged detail diagram of section B.

[0020] In the diagram: 1. Bearing chamber body, 101. Front connecting ring seat, 102. Rear connecting ring seat, 103. Front boss, 104. Oil injection port, 105. Assembly port, 106. Outer oil cavity, 107. Inner oil cavity, 108. Oil drain port, 109. Assembly base, 110. Connection passage, 111. Oil outlet port, 2. Main shaft, 21. Heat dissipation cavity, 22. Oil inlet port, 23. Oil drain port, 3. Front seal, 4. Rear seal, 5. Assembly bushing, 51. Annular groove, 52. Connection through hole, 61. Front bearing, 62. Rear bearing. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 2-4A novel integrated cast steel bearing housing for centrifuges includes an integrated cast steel bearing housing body 1. A front connecting ring seat 101 and a rear connecting ring seat 102 are respectively provided at the front and rear ends of the bearing housing body 1. A front boss 103 is provided on the inner side of the front connecting ring seat 101 at the front end of the bearing housing body 1. An oil injection port 104 is provided on the outer periphery of the top of the rear connecting ring seat 102 at the rear end of the bearing housing body 1. An assembly port 105 is provided at the shaft center of the bearing housing body 1. An outer oil cavity 106 and an inner oil cavity 107 are provided inside the bearing housing body 1, which are connected to the assembly port 105. The inner oil cavity 107 is connected to the oil injection port 104.

[0023] The bearing housing body 1 is equipped with a main shaft 2, a front seal 3, a rear seal 4, and an assembly bushing 5. The front bearing 61 and the rear bearing 62 are respectively assembled at the front and rear ends of the assembly port 105. The main shaft 2 is rotatably installed in the assembly port 105 through the front bearing 61 and the rear bearing 62. The front seal 3 is fixedly installed on the front boss 103 and maintains a sealing fit with the front end of the main shaft 2. The rear seal 4 is fixedly installed on the rear connecting ring seat 102. The assembly bushing 5 is sleeved on the outside of the main shaft 2 and rotatably installed in the assembly port 105. The inner oil cavity 107 is arranged on the outside of the assembly bushing 5.

[0024] The front connecting ring seat 101, the rear connecting ring seat 102, the front boss 103, and the oil injection port 104 are all integrated onto the bearing housing body 1 and manufactured by one-piece casting. No additional bearing housing is required. The front connecting ring seat 101 can be fixedly connected to the centrifuge housing, while the front boss 103 can ensure the stable installation of the front seal 3 and effectively seal the assembly interface between the front end of the main shaft 2 and the bearing housing body 1, ensuring that the main shaft 2 will not leak oil or depressurize when operating at high speed. The front end of the main shaft 2 is used to connect the rotor components of the centrifuge.

[0025] After the front connecting ring seat 101 is sealed and combined with the centrifuge housing, it forms an annular oil chamber with the oil passage on the housing. The high-pressure oil flowing to this chamber can dissipate heat and lubricate the main shaft 2 and the connected rotor components.

[0026] The rear seal 4 is fixedly assembled onto the rear connecting ring seat 102. The drive motor connector and the rear seal 4 maintain a sealed fit. The output shaft of the drive motor is connected to the rear end of the main shaft 2. The oil passage in the drive motor connector and the inner space of the rear connecting ring seat 102 combine to form another annular oil cavity. The high-pressure oil injected into this annular oil cavity can fully lubricate and dissipate heat for the output shaft of the drive motor and the rear end of the main shaft 2.

[0027] The oil injection port 104 can input high-pressure oil into the inner oil cavity 107 in the bearing housing body 1, and then enter the inner side of the spindle 2 through the assembly bushing 5. The high-pressure oil flows inside the spindle 2 and carries away the heat before entering the outer oil cavity 106 to carry away the heat on the outside of the spindle 2, so as to achieve efficient heat dissipation of the spindle 2.

[0028] To ensure that the high-pressure oil flowing into the inner side of the front connecting ring seat 101 can circulate and quickly carry away the heat generated by the main shaft 2 and the rotor components, an oil drain port 108 is provided at the bottom of the front connecting ring seat 101.

[0029] The high-pressure oil flowing to the annular oil chamber (i.e., the annular area between the front connecting ring seat 101 and the front end of the main shaft 2) fully exchanges heat and cools the front end of the main shaft 2 and the rotor components, and flows out through the oil drain port 108 to dissipate heat, so as to realize the circulation of high-pressure oil here.

[0030] To ensure that the integrated cast steel bearing chamber can be stably installed on the centrifuge housing structure and to ensure that the high-pressure oil flowing in the annular oil chamber on the drive motor side can be quickly discharged to achieve rapid heat removal, an assembly base 109 is provided at the bottom of the bearing chamber body 1. The assembly base 109 has a connection passage 110 that communicates with the inner side of the rear connecting ring seat 102.

[0031] The mounting base 109 can be installed onto the centrifuge housing structure by bolt fixing, and the connecting passage 110 is connected to the oil passage provided in the housing structure. The high-pressure oil flowing in the annular oil cavity inside the connecting ring seat 102 can carry away the heat of the drive motor output shaft and the rear end of the main shaft 2 along the connecting passage 110.

[0032] To ensure that the high-pressure oil in the inner oil cavity 107 can be effectively delivered to the inside of the spindle 2 and efficiently dissipated, the following technical solution is provided.

[0033] A heat dissipation cavity 21 is provided at the center of the spindle 2. An annular groove 51 is provided on the inner wall of the mounting bushing 5. A radially distributed connecting through hole 52 is provided evenly on the mounting bushing 5. The connecting through hole 52 is in communication with the inner oil cavity 107 and the annular groove 51. An oil inlet 22 is provided on the side wall of the spindle 2 and arranged inside the annular groove 51. The oil inlet 22 is in communication with the heat dissipation cavity 21 and the annular groove 51.

[0034] The connection through hole 52 on the assembly shaft allows high-pressure oil in the inner oil cavity 107 to be input into the annular through groove 51 on its inner side, and then input into the heat dissipation cavity 21 inside the spindle 2 through the oil inlet 22 provided on the spindle 2. When the high-pressure oil flows in the heat dissipation cavity 21, it can quickly carry away the heat accumulated therein.

[0035] To ensure that the high-pressure oil flowing in the heat dissipation cavity 21 of the spindle 2 can be input into the outer oil cavity 106 to quickly remove the heat accumulated on the outside of the spindle 2, an oil drain port 23 is provided on the side wall of the spindle 2. The oil drain port 23 is connected to the heat dissipation cavity 21 and the outer oil cavity 106.

[0036] The high-pressure oil flowing in the heat dissipation cavity 21 can be input into the outer oil cavity 106 through the oil drain port 23. When the high-pressure oil flows in the outer oil cavity 106, it can quickly carry away the heat accumulated on the outside of the spindle 2.

[0037] To ensure that the high-pressure oil flowing in the inner oil cavity 107, the outer oil cavity 106, and the heat dissipation cavity 21 in the main shaft 2 can circulate, an oil outlet 111 is provided at the bottom of the bearing chamber body 1, and the oil outlet 111 is connected to the outer oil cavity 106.

[0038] After the bearing chamber body 1 is fixedly connected to the centrifuge housing via the bottom mounting base 109, the oil outlet 111 can be connected to the corresponding oil passage on the centrifuge housing. The high-pressure oil input from the oil injection port 104 passes sequentially through the inner oil chamber 107, the heat dissipation chamber 21, and the outer oil chamber 106, and then flows into the oil passage in the centrifuge housing through the oil outlet 111. After being cooled down in this oil passage, it can be re-injected into the bearing chamber body 1 through the oil injection port 104, realizing the circulation of high-pressure oil and efficient heat dissipation of the main shaft 2.

[0039] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0040] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A novel integrated cast steel bearing housing for centrifuges, characterized in that: The bearing housing body (1) is made of one-piece cast steel. The front and rear ends of the bearing housing body (1) are respectively provided with a front connecting ring seat (101) and a rear connecting ring seat (102). The front end of the bearing housing body (1) is provided with a front boss (103) arranged inside the front connecting ring seat (101). The rear end of the bearing housing body (1) is provided with an oil injection port (104) arranged on the top periphery of the rear connecting ring seat (102). The bearing housing body (1) is provided with an assembly port (105) at the shaft center. The bearing housing body (1) is provided with an outer oil cavity (106) and an inner oil cavity (107) that are connected to the assembly port (105). The inner oil cavity (107) is connected to the oil injection port (104). The bearing housing body (1) is equipped with a main shaft (2), a front seal (3), a rear seal (4), and an assembly bushing (5). The front and rear ends of the assembly port (105) are respectively equipped with a front bearing (61) and a rear bearing (62). The main shaft (2) is rotatably installed in the assembly port (105) through the front bearing (61) and the rear bearing (62). The front seal (3) is fixedly installed on the front boss (103) and maintains a sealing fit with the front end of the main shaft (2). The rear seal (4) is fixedly installed on the rear connecting ring seat (102). The assembly bushing (5) is sleeved on the periphery of the main shaft (2) and rotatably installed in the assembly port (105). The inner oil cavity (107) is arranged on the periphery of the assembly bushing (5).

2. The novel integrated cast steel bearing chamber for centrifuges according to claim 1, characterized in that: The bottom of the front connecting ring seat (101) is provided with an oil drain port (108).

3. The novel integrated cast steel bearing chamber for centrifuges according to claim 1, characterized in that: The bottom of the bearing housing body (1) is provided with an assembly base (109), and the assembly base (109) has a connection passage (110) that is connected to the inner side of the rear connecting ring seat (102).

4. The novel integrated cast steel bearing chamber for centrifuges according to claim 1, characterized in that: A heat dissipation cavity (21) is provided at the center of the spindle (2). An annular groove (51) is provided on the inner wall of the assembly bushing (5). A radially distributed connecting hole (52) is provided on the assembly bushing (5). The connecting hole (52) is connected to the inner oil cavity (107) and the annular groove (51). An oil inlet (22) is provided on the side wall of the spindle (2) and arranged inside the annular groove (51). The oil inlet (22) is connected to the heat dissipation cavity (21) and the annular groove (51).

5. A novel integrated cast steel bearing chamber for a centrifuge according to claim 4, characterized in that: The main shaft (2) has an oil drain port (23) on its side wall, and the oil drain port (23) is connected to the heat dissipation cavity (21) and the outer oil cavity (106).

6. A novel integrated cast steel bearing chamber for a centrifuge according to claim 5, characterized in that: The bearing chamber body (1) has an oil outlet (111) at the bottom, and the oil outlet (111) is connected to the outer oil cavity (106).

Images