An adjustable damping oil distribution unit

Abstract

The present invention discloses an adjustable damping oil separation unit, which includes an end face flange, a damping oil separation body, a valve core and a nut flange. The end face flange is fixed to the left side of the damping oil separation body, and an oil inlet hole is provided at the longitudinal middle position of the end face flange; an annular groove is provided inside the damping oil separation body, and a pressure gauge mounting hole and an oil outlet hole are respectively provided at two ends corresponding to the annular groove on the outer circle of the damping oil separation body; a valve core is provided in the damping oil separation body, and a rectangular thread is provided on the left part of the valve core, a sealing groove is provided in the middle, and a fine thread is provided on the right side of the sealing groove; the center of the nut flange is connected to the valve core thread, and the nut flange is fixed to the right side of the damping oil separation body. The present invention controls the length of the path of the oil flowing through the rectangular thread by the position of the valve core in the damping oil separation body, thereby achieving the function of adjusting the damping oil separation, solving the technical problems of the difficulty in adjusting the static pressure oil film of the constant pressure static pressure guide rail and the poor retention of the oil film stiffness, and is convenient and fast to operate and accurate to adjust.

Description

Technical Field

[0001] The invention relates to an adjustable damping oil distribution unit, belonging to the technical field of mechanical hydraulic adjustment. Background Art

[0002] Hydrostatic guideways are widely used in high-precision CNC machine tools due to their low friction coefficient and excellent vibration resistance. The X-axis and Z-axis guideways of the vertical tool post of high-precision vertical lathes are generally constant-pressure hydrostatic guideways. The guideway's oil film thickness, lift, pressure, and other indicators must be maintained by adjusting the length of the damping tube in each hydraulic chamber. Because the lift and oil film stiffness of the hydrostatic guideway can only truly reflect the state of the hydrostatic guideway during use after the tool post is assembled and lubricated, each adjustment requires the operator to disassemble and adjust the length of the damping tube multiple times while working at high altitude and in a small space. Frequently, after multiple adjustments, the damping tube cannot be adjusted again and needs to be replaced. The existing adjustment method is to adjust the length of the damping tube, that is, to adjust the number of turns of the damping tube coil in front of the pressure gauge. Each time an adjustment is made, if the pressure is incorrect or too high, a section will be cut off. This will take a long time to adjust and make the operation difficult, which will seriously affect the work efficiency. The fewer the remaining damping tube turns, the worse the oil film stiffness retention and the weaker the impact resistance of the guide rail. Under the extreme load, the oil film will easily become thinner or disappear, which will eventually lead to scratches on the guide rail surface. Summary of the Invention

[0003] In order to overcome the shortcomings of the existing technology, the present invention provides an adjustable damping oil separation unit, which controls the length of the path of the oil flowing through the rectangular thread by the position of the valve core in the damping oil separation body, so as to achieve the effect of adjusting the damping oil separation, and solves the technical problems of the difficulty in adjusting the static pressure oil film of the constant pressure static pressure guide rail and the poor retention of the oil film stiffness. The operation is convenient and quick, and the adjustment is accurate.

[0004] The technical solution adopted by the present invention to solve its technical problems is: an adjustable damping oil-separating unit, including an end face flange, a damping oil-separating body, a valve core and a nut flange, the end face flange being fixed to the left side of the damping oil-separating body, and an L-shaped oil inlet hole being provided at the longitudinal middle position of the end face flange, the oil inlet hole being communicated with the inner cavity of the damping oil-separating body, and an end face sealing ring being provided between the end face flange and the damping oil-separating body; an annular groove being provided at the middle position inside the damping oil-separating body, a pressure gauge mounting hole and an oil outlet hole being respectively provided at both ends of the outer circle of the damping oil-separating body corresponding to the annular groove; a valve core being provided inside the damping oil-separating body, a rectangular thread being provided on the core part on the left side of the valve core, a sealing groove being provided at the middle position, a valve core sealing ring being provided in the sealing groove, and a fine thread being provided on the valve core on the right side of the sealing groove; a fine thread being provided at the center of the nut flange and being connected to the valve core thread, and the nut flange being fixed to the right side of the damping oil-separating body.

[0005] The adjustable damping oil distribution unit is lubricated with oil through the L-shaped oil inlet hole in the longitudinal middle position of the end face flange. The lubricating oil enters the damping oil distribution body and flows out through the rectangular thread and oil outlet hole at the front end of the left side of the valve core. When adjusting the damping, monitor the pressure gauge at the pressure gauge installation hole, and adjust the position of the valve core in the damping oil distribution body by screwing the outer hexagon on the right side of the valve core. The position of the valve core controls the length of the path of the oil flowing through the rectangular thread to achieve the purpose of adjusting the damping oil distribution.

[0006] The beneficial effects of the present invention are: the present invention effectively solves technical problems such as the difficulty in adjusting the static pressure oil film of the constant pressure static pressure guide rail and the poor retention of the oil film stiffness. There is no need to adjust the damping tube or replace the damping tube. The position of the valve core is used to control the length of the path of the oil flowing through the rectangular thread to achieve the effect of adjusting the damping oil distribution. The adjustable damping oil distribution unit has the characteristics of simple structure, convenient and quick operation, accurate adjustment, and work efficiency is no longer affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0008] Figure 1 It is a structural schematic diagram of the present invention.

[0009] Figure 2 It is a structural diagram of the valve core.

[0010] Figure 3 is a schematic diagram of the minimum damping position.

[0011] Figure 4 is a schematic diagram of the maximum damping position.

[0012] Figure 5 It is a structural diagram of the damping oil separator.

[0013] Figure 6 It is a side view of the nut flange.

[0014] Numbers in the figure:

[0015] 1. End face flange, 101, oil inlet hole, 2. Handle screw, 3. End face sealing ring, 4. Damping oil distributor, 401, pressure gauge mounting hole, 402, oil outlet hole, 403, ring groove, 5. Valve core, 501, rectangular thread, 502, sealing groove, 503, fine thread, 504, external hexagon, 6. Valve core sealing ring, 7. Nut flange. DETAILED DESCRIPTION

[0016] like Figure 1As shown in FIG6, an adjustable damping oil separation unit includes an end flange 1, a damping oil separation body 4, a valve core 5 and a nut flange 7. The end flange 1 is located on the left side of the damping oil separation body 4 and is fixedly connected to the damping oil separation body 4 by a screw 2; a horizontal valve core 5 is provided inside the damping oil separation body 4, and a rectangular thread 501 for adjusting the damping is provided on the left side of the valve core 5, and a sealing groove 502 for preventing oil overflow is provided in the middle position. The rectangular thread 501 and the sealing groove 502 are both aligned with the inner wall of the damping oil separation body 4. The valve core sealing ring 6 is fitted in the sealing groove 502. On the right side of the sealing groove 502, the valve core 5 is provided with a fine thread 503 for adjusting the horizontal movement of the damping valve core 5. The right tail end of the valve core 5 is provided with an external hexagonal 504 for screwing with a wrench; a thread is provided at the center of the nut flange 7, which is used in conjunction with the fine thread 503 at the right end of the valve core 5. The nut flange 7 is threadedly connected to the valve core 5. A closing screw hole 2 is provided on the surface of the nut flange 7, which is closed to the right side of the damping oil separator 4 by the closing screw 2.

[0017] The center of the damping oil separator 4 is a cylindrical structural part with good surface roughness. An annular groove 403 for oil flow is provided in the middle position inside the damping oil separator 4. The position of the annular groove 403 is determined according to the damping stroke; a pressure gauge mounting hole 401 and an oil outlet hole 402 are respectively provided at both ends of the position corresponding to the annular groove 403 on the outer circle of the damping oil separator 4. The pressure gauge mounting hole 401 is used to connect the pressure gauge, and the oil outlet hole 402 is used to connect the oil outlet pipe joint.

[0018] An L-shaped oil inlet hole 101 is provided at the longitudinal middle position of the end face flange 1 , and the oil inlet hole 101 is communicated with the inner cavity of the damping oil separator 4 . The oil inlet hole 101 is used to input hydraulic oil into the adjustable damping oil separator unit.

[0019] An end face sealing ring 3 is provided between the end face flange 1 and the damping oil separator 4. The end face sealing ring 3 can effectively prevent oil from overflowing from the two joint surfaces.

[0020] When the adjustable damping oil-separating unit is in use, the outer hexagonal 504 at the right end of the valve core 5 is screwed, and the valve core 5 is engaged with the nut flange 7 to drive the valve core 5 to move in the internal cavity of the damping oil-separating body 4, and the position of the valve core 5 inside the damping oil-separating body 4 is adjusted, that is, the incoming oil flows through the stroke of the rectangular thread 501 to achieve the effect of adjusting the damping.

[0021] The adjustable damping oil-distributing unit is fed with lubricating oil through the L-shaped oil inlet hole 101 at the longitudinal middle position of the end face flange 1. The lubricating oil enters the damping oil-distributing body 4 and flows out through the rectangular thread 501 and the oil outlet hole 402 at the front end of the left side of the valve core 5. When adjusting the damping, monitor the pressure gauge at the pressure gauge mounting hole 401 and adjust the position of the valve core 5 in the damping oil-distributing body 4 by screwing the outer hexagonal screw 504 on the right side of the valve core 5. Figure 3 The position is the minimum damping position, such as Figure 4 The position is the maximum damping position, and the length of the path of the oil flowing through the rectangular thread 501 is controlled by the position of the valve core 5 to achieve the function of adjusting the damping oil distribution.

Claims

1. An adjustable damping oil distribution unit, characterized by: The invention comprises an end face flange (1), a damping oil separator (4), a valve core (5) and a nut flange (7), wherein the end face flange (1) is fixedly connected to the left side of the damping oil separator (4); a valve core (5) is provided inside the damping oil separator (4); a left core portion of the valve core (5) is provided with a rectangular thread (501), a sealing groove (502) is provided at the middle position, a valve core sealing ring (6) is provided in the sealing groove (502), and a fine thread (503) is provided on the valve core (5) on the right side of the sealing groove (502); a thread is provided at the center of the nut flange (7) and is threadedly connected to the valve core (5), and the nut flange (7) is fixedly connected to the right side of the damping oil separator (4); The damping oil separator (4) is a cylindrical structural member. An annular groove (403) is provided at a middle position inside the damping oil separator (4). A pressure gauge mounting hole (401) and an oil outlet hole (402) are provided at both ends of the outer circle of the damping oil separator (4) at positions corresponding to the annular groove (403). An L-shaped oil inlet hole (101) is provided at the longitudinal middle position of the end face flange (1), and the oil inlet hole (101) is communicated with the inner cavity of the damping oil separator (4).

2. The adjustable damping oil separation unit according to claim 1, characterized in that: An end face sealing ring (3) is provided between the end face flange (1) and the damping oil separator (4).

Images