A hydrostatic spindle for a linear rail grinding machine

Abstract

The utility model discloses a kind of liquid static pressure spindles for linear rail grinding machine, belong to grinding machine spindle technical field. Mainly include: shaft body, the shaft body includes shell, shaft rod is installed at the middle part of shell, hydraulic oil import and hydraulic oil export are installed at the outer end of shell;Filtering mechanism, with two and two filtering mechanism intercommunication, set up in the side of shaft body, including shell, the upper end of shell is rotatably connected with sealing cover, filter element is arranged in the inside of shell;Pipeline one, with the liquid inlet end of one described filtering mechanism connection, including liquid passage pipe one and backflush pipe one;Pipeline two, with the liquid outlet end of another described filtering mechanism connection, including liquid passage pipe two and backflush pipe two, one end of liquid passage pipe two is communicated with the liquid outlet end of adjacent filtering mechanism, other end is communicated with hydraulic oil import. The application realizes two-stage filtration and on-line backwashing function of hydraulic oil, reduces downtime, improves equipment operation efficiency and safety.

Description

Technical Field

[0001] This utility model relates to the field of grinding machine spindle technology, specifically a hydrostatic spindle for a linear guide grinding machine. Background Technology

[0002] A hydrostatic spindle is a precision component that uses a high-pressure oil film to support the rotation of a shaft. It is widely used in high-precision grinding machines, milling machines, and other machine tools, and its performance directly affects the accuracy and surface quality of the machined workpiece. During operation, hydraulic oil enters the spindle through the inlet, forming a uniform oil film between the shaft and bearings, achieving contactless support and thus ensuring stability and accuracy at high speeds.

[0003] Existing hydrostatic spindles are typically equipped with filtration systems to remove impurities from the hydraulic oil and prevent wear and clogging. However, traditional filtration systems often employ single-stage or parallel filtration methods, which suffer from limited filtration efficiency, inconvenient filter element replacement, and difficult system cleaning. Especially after prolonged operation, filter element clogging can lead to a drop in oil pressure, affecting spindle performance. Furthermore, backflushing is complex, requiring machine shutdown and disassembly, thus reducing equipment utilization. Therefore, it is necessary to provide a hydrostatic spindle for linear guide grinding machines to address these issues.

[0004] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a hydrostatic spindle for a linear guide grinding machine, which realizes the dual-stage filtration and online backwashing function of hydraulic oil, reduces downtime, and improves equipment operating efficiency and safety.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is: a hydrostatic spindle for a linear guide grinding machine, comprising:

[0007] The shaft includes a housing, a shaft rod is installed in the middle of the housing, and a hydraulic oil inlet and a hydraulic oil outlet are installed at the outer end of the housing;

[0008] The filter mechanism has two filters that are interconnected and are located on one side of the shaft. It includes a housing, with a sealing cover rotatably connected to the upper end of the housing, and a filter element is installed inside the housing.

[0009] Pipeline 1, which is connected to the liquid inlet of one of the filter mechanisms, includes a liquid passage pipe 1 and a backflush pipe 1;

[0010] Pipeline 2, which is connected to the liquid outlet of another filter mechanism, includes a liquid passage pipe 2 and a backflush pipe 2. One end of the liquid passage pipe 2 is connected to the liquid outlet of the adjacent filter mechanism, and the other end is connected to the hydraulic oil inlet.

[0011] Furthermore, a liquid outlet pipe is fixedly connected to the lower end of the housing, a liquid inlet pipe is fixedly provided on one side of the upper end of the housing, and a port communicating with the inside of the sealing cover is provided on one side of the sealing cover. When the sealing cover is closed, the liquid inlet pipe and the port are connected.

[0012] Furthermore, the two housings are connected by a connecting pipe, one end of which is connected to the liquid outlet pipe of one housing and the other end is connected to the liquid inlet pipe of the other housing.

[0013] Furthermore, the upper end of the housing is rotatably connected to multiple screws, and the outer ends of the multiple screws are fitted with threaded sleeves. When the sealing cover is closed, the lower end of the threaded sleeve abuts against the concave edge of the sealing cover.

[0014] Furthermore, the two filter elements are used for coarse filtration and fine filtration, respectively, with the filter element for coarse filtration installed inside the housing away from the hydraulic oil inlet.

[0015] Furthermore, one end of the liquid inlet pipe is connected to the adjacent liquid inlet pipe, the backflushing pipe is fixedly connected to the liquid inlet pipe, and valve one and valve two are respectively installed at the outer ends of the liquid inlet pipe and the backflushing pipe.

[0016] Furthermore, the second backflush pipe is fixedly connected to the second liquid passage pipe, and the outer ends of the second liquid passage pipe and the second backflush pipe are respectively equipped with valve three and valve four.

[0017] By adopting the above technical solution, this utility model has the following beneficial effects: The hydrostatic spindle for a linear guide grinding machine provided in this application realizes the dual-stage filtration and online backwashing function of hydraulic oil by setting two interconnected filtration mechanisms and configuring pipelines with backwashing function respectively. The graded arrangement of coarse and fine filter elements effectively improves filtration accuracy and extends filter element life; the sealing cover is tightened by screws and screw sleeves, which is convenient to open and close, and facilitates filter element replacement and maintenance; the backwashing pipeline can perform reverse flushing without disassembling the filter element, reducing downtime and improving equipment operating efficiency and safety. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0019] Figure 1 This is a schematic diagram of a hydrostatic spindle for a linear guide grinding machine according to this application. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of a hydrostatic spindle for a linear guide grinding machine according to this application. Figure 2 ;

[0021] Figure 3 This is a schematic diagram of the filtration mechanism of a hydrostatic spindle for a linear guide grinding machine according to this application;

[0022] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0023] The following are the labeling elements in the figure:

[0024] 1. Shaft; 11. Housing; 12. Shaft rod; 13. Hydraulic oil inlet; 14. Hydraulic oil outlet; 2. Filtering mechanism; 21. Housing; 22. Sealing cover; 23. Inlet pipe; 24. Filter element; 25. Port; 26. Screw; 27. Screw sleeve; 3. Connecting pipe; 4. Pipeline 1; 41. Fluid inlet pipe 1; 42. Backflush pipe 1; 43. Valve 1; 44. Valve 2; 5. Pipeline 2; 51. Fluid inlet pipe 2; 52. Backflush pipe 2; 53. Valve 3; 54. Valve 4. Detailed Implementation

[0025] Those skilled in the art can refer to the content of this document and appropriately improve the process parameters to achieve the desired results. It should be particularly noted that all similar substitutions and modifications are obvious to those skilled in the art and fall within the scope of protection of this utility model. The method and application of this utility model have been described through preferred embodiments. Those skilled in the art can clearly modify or appropriately change and combine the method and application described herein without departing from the content, spirit, and scope of this utility model to implement and apply the technology of this utility model.

[0026] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0027] like Figure 1-4 As shown, this application provides a hydrostatic spindle for a linear guide grinding machine, including a spindle body 1. The spindle body 1 is a cylindrical structure with a precision bearing cavity inside. The spindle body 1 includes a housing 11, and a shaft 12 is mounted on the middle of the housing 11 via a bearing. A hydraulic oil inlet 13 and a hydraulic oil outlet 14 are respectively installed on the outer end of the housing 11. Hydraulic oil enters from the hydraulic oil inlet 13, forming a hydrostatic oil film between the shaft 12 and the bearing, supporting the high-speed rotation of the shaft 12, and then flows back to the oil tank from the hydraulic oil outlet 14.

[0028] Two filter mechanisms 2 are provided on one side of the shaft 1. The two filter mechanisms 2 are connected to each other through a connecting pipe 3. The filter mechanism 2 includes a housing 21. The upper end of the housing 21 is rotatably connected to a sealing cover 22 via a hinge. A filter element 24 is detachably installed inside the housing 21. An outlet pipe is fixedly connected to the lower end of the housing 21. An inlet pipe 23 is fixedly installed on one side of the upper end of the housing 21. A port 25 communicating with the inside of the sealing cover 22 is provided on one side of the sealing cover 22. When the sealing cover 22 is closed, the inlet pipe 23 and the port 25 are aligned and connected. Hydraulic oil can enter the inside of the housing 21 through the inlet pipe 23, be filtered by the filter element 24, and then flow out from the outlet pipe.

[0029] Two filter elements 24 are used for coarse filtration and fine filtration, respectively. The filter element 24 used for coarse filtration is installed inside the housing 21 away from the hydraulic oil inlet 13 to initially filter larger particulate impurities. The filter element 24 used for fine filtration is installed inside the housing 21 close to the hydraulic oil inlet 13 to filter fine particles and ensure the cleanliness of the hydraulic oil entering the spindle.

[0030] Please see Figures 3-4 As shown, multiple screws 26 are rotatably connected to the upper end of the housing 21. Each screw 26 has a threaded sleeve 27 fitted onto its outer end. When the sealing cover 22 is closed, the threaded sleeve 27 is rotated so that its lower end abuts against the recessed edge of the sealing cover 22. The threaded locking force presses the sealing cover 22 tightly, ensuring sealing performance and preventing oil leakage. This structure facilitates quick opening and closing of the sealing cover 22, making it convenient for replacing and cleaning the filter element 24.

[0031] The two housings 21 are connected by a connecting pipe 3. One end of the connecting pipe 3 is connected to the liquid outlet pipe of one housing 21, and the other end is connected to the liquid inlet pipe 23 of the other housing 21. The hydraulic oil can flow through the two filter mechanisms 2 in sequence to achieve dual-stage filtration.

[0032] Pipeline 4 is connected to the inlet end of a filter mechanism 2, including a liquid passage pipe 41 and a backflush pipe 42. One end of the liquid passage pipe 41 is connected to the adjacent inlet pipe 23. The backflush pipe 42 is fixedly connected to and communicates with the liquid passage pipe 41. The outer ends of the liquid passage pipe 41 and the backflush pipe 42 are respectively equipped with valve 43 and valve 44.

[0033] Pipeline 2 5 is connected to the liquid outlet of another filter mechanism 2, and includes a liquid passage pipe 2 51 and a backflushing pipe 2 52. One end of the liquid passage pipe 2 51 is connected to the liquid outlet of the adjacent filter mechanism 2, and the other end is connected to the hydraulic oil inlet 13. The backflushing pipe 2 52 is fixedly connected to and communicates with the liquid passage pipe 2 51. The outer ends of the liquid passage pipe 2 51 and the backflushing pipe 2 52 are respectively equipped with valve 3 53 and valve 4 54.

[0034] Under normal operating conditions, valves 1 (43) and 3 (53) are open, while valves 2 (44) and 4 (54) are closed. Hydraulic oil from the external oil pump enters the first filter mechanism 2 (coarse filter) through the fluid inlet pipe 1 (41). After coarse filtration, it enters the second filter mechanism 2 (fine filter) through the connecting pipe 3. The clean oil after fine filtration is transported to the hydraulic oil inlet 13 through the fluid inlet pipe 2 (51) and enters the spindle.

[0035] When backwashing is required, the valve status can be switched. Close valve 1 (43) and valve 3 (53), and open valve 2 (44) and valve 4 (54). The cleaning fluid enters the fine filter housing 21 from backwash pipe 2 (52) and flows in reverse. After rinsing the filter element 24, the dirty oil is discharged from backwash pipe 1 (42). This design realizes online backwashing without disassembling the filter element 24, effectively reducing maintenance time and downtime losses.

[0036] Working principle: When the equipment is started and grinding is performed, valve 1 (43) and valve 3 (53) are opened, while valve 2 (44) and valve 4 (54) are closed.

[0037] Hydraulic oil from an external oil pump, driven by pressure, enters the housing 21 of the first filter mechanism 2 through the inlet pipe 23 via the fluid inlet pipe 41 of pipeline 4. The hydraulic oil first passes through the coarse filter element 24, which filters out larger solid particles and impurities, completing the first stage of filtration.

[0038] The coarsely filtered oil flows out from the outlet pipe at the lower end of the housing and is transported to the inlet pipe 23 of the second filtration mechanism 2 through the connecting pipe 3. After entering the second housing 21, the oil is forced to pass through the fine filter element 24 with higher precision for deep filtration to remove fine particles.

[0039] Finally, the clean hydraulic oil is delivered to the main spindle hydraulic oil inlet 13 through the fluid inlet pipe 51 of pipeline 25, and the oil after operation flows back to the oil tank from the hydraulic oil outlet 14.

[0040] When backwashing, first close valve 1 (43) and valve 3 (53), and at the same time open valve 2 (44) and valve 4 (54). Clean oil or special cleaning fluid from the external oil pump enters pipeline 2 (5) through backwash pipe 2 (52) and flows in reverse into the housing 21 of the second filter mechanism 2.

[0041] The oily liquid carrying the flushed-off contaminants flows out of the housing 21 of the second filter mechanism 2 and then flows back into the housing 21 of the first filter mechanism 2 via the connecting pipe 3, forming a secondary flush for the coarse filter element 24. Finally, all the oily waste is collected and discharged from the system through the backwash pipe 42.

[0042] After rinsing, switch the valve back to normal filtration mode.

[0043] The specific embodiments described above further illustrate the technical problems, technical solutions, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A hydrostatic spindle for a linear guide grinding machine, characterized in that, include: Shaft (1), the shaft (1) includes a housing (11), a shaft (12) is installed in the middle of the housing (11), and a hydraulic oil inlet (13) and a hydraulic oil outlet (14) are installed at the outer end of the housing (11). The filter mechanism (2) has two filters (2) that are interconnected and are located on one side of the shaft (1). It includes a housing (21), and a sealing cover (22) is rotatably connected to the upper end of the housing (21). A filter element (24) is provided inside the housing (21). Pipeline 1 (4), which is connected to the inlet end of a filter mechanism (2), includes a liquid inlet pipe 1 (41) and a backflushing pipe 1 (42). Pipeline 2 (5), which is connected to the liquid outlet of another filter mechanism (2), includes liquid inlet pipe 2 (51) and backflushing pipe 2 (52). One end of liquid inlet pipe 2 (51) is connected to the liquid outlet of the adjacent filter mechanism (2), and the other end is connected to the hydraulic oil inlet (13).

2. The hydrostatic spindle for a linear guide grinding machine according to claim 1, characterized in that: The lower end of the housing (21) is fixedly connected to a liquid outlet pipe, and the upper end of the housing (21) is fixedly provided with a liquid inlet pipe (23). The sealing cover (22) is provided with a port (25) communicating with the inside of the sealing cover (22) on one side. When the sealing cover (22) is closed, the liquid inlet pipe (23) and the port (25) are connected.

3. A hydrostatic spindle for a linear guide grinding machine according to claim 2, characterized in that: The two housings (21) are connected by a connecting pipe (3), one end of which is connected to the liquid outlet pipe of one housing (21) and the other end is connected to the liquid inlet pipe (23) of the other housing (21).

4. A hydrostatic spindle for a linear guide grinding machine according to claim 3, characterized in that: The upper end of the housing (21) is rotatably connected to a plurality of screws (26), and the outer ends of the plurality of screws (26) are fitted with screw sleeves (27). When the sealing cover (22) is closed, the lower end of the screw sleeve (27) abuts against the inner edge of the sealing cover (22).

5. A hydrostatic spindle for a linear guide grinding machine according to claim 1, characterized in that: The two filter elements (24) are used for coarse filtration and fine filtration, respectively. The filter element (24) used for coarse filtration is installed inside the housing (21) away from the hydraulic oil inlet (13).

6. A hydrostatic spindle for a linear guide grinding machine according to claim 1, characterized in that: One end of the liquid inlet pipe (41) is connected to the adjacent liquid inlet pipe (23), and the backflushing pipe (42) is fixedly connected to the liquid inlet pipe (41). The outer ends of the liquid inlet pipe (41) and the backflushing pipe (42) are respectively equipped with valve one (43) and valve two (44).

7. A hydrostatic spindle for a linear guide grinding machine according to claim 1, characterized in that: The second backflush pipe (52) is fixedly connected to the second liquid flow pipe (51), and the outer ends of the second liquid flow pipe (51) and the second backflush pipe (52) are respectively equipped with valve three (53) and valve four (54).

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