Detachable throttler and hydrostatic bearing

Abstract

The utility model discloses a detachable throttler and hydrostatic bearing belongs to throttler technical field, including shell, first plug and capillary tube, be equipped with liquid channel in the shell, the capillary tube is provided in the liquid channel, the first plug is sleeved on the outer wall of capillary tube, and the first plug is sleeved on the outer wall of capillary tube. The first plug is arranged close to one end of the shell, the capillary tube further comprises a sealing ring, the sealing ring is arranged on the outer wall of the capillary tube in a sleeving mode, one end face of the sealing ring abuts against one end of the first plug, the outer wall of the sealing ring abuts against the inner wall of the liquid channel, and the functions of shock absorption and energy absorption are achieved; and the service life of the capillary tube is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of throttles, in particular to a detachable throttle and a static pressure bearing. Background Art

[0002] The liquid hydrostatic bearing is a bearing in which the oil supply device delivers pressurized hydraulic oil into the bearing oil chamber through the compensation element, and a hydraulic oil layer with a certain pressure is formed in the bearing oil chamber to float the main shaft, and the pressure difference between the hydrostatic oil chambers is used to bear the external load. Therefore, the hydrostatic bearing has a small rotational friction resistance. In order to make the hydrostatic bearing have a certain load-bearing capacity and rigidity, its compensation element needs to adjust the oil pressure so that the oil chamber pressure of the bearing can be automatically adjusted with the change of the external load. According to the different pressure adjustment methods, the oil supply method of the hydrostatic bearing can be divided into constant pressure oil supply and constant flow oil supply. Hydrostatic bearings using constant pressure oil supply have the advantages of simple structure and convenient adjustment and are widely used. Hydrostatic bearings using constant pressure oil supply usually use throttles as compensation elements. Capillary throttles are widely used in actual production because of their low installation cost and reliable operation. Existing capillary throttles have limited rigidity and are easily blocked by bending moments, resulting in a short service life. Moreover, it is not convenient to replace the throttle after blocking.

[0003] The existing patent application with publication number CN111980986A discloses a single-rod high-frequency impact test hydraulic cylinder, including a cylinder barrel, a piston rod, a guide sleeve, at least one static pressure oil port and at least one static pressure oil chamber, the cylinder barrel is a hollow cylindrical structure, a large cavity oil port and a small cavity oil port are arranged on one side outside the circumference of the cylinder barrel, one end of the cylinder barrel is an open end and the other end is a closed end, the piston rod is arranged inside the cylinder barrel, one end of the piston rod can extend out of the open end of the cylinder barrel, the guide sleeve is a hollow annular structure, the guide sleeve is arranged on the rod body of the piston rod and is located on one side of the open end of the cylinder barrel, the static pressure oil port is arranged on the outer circumference of the guide sleeve, the static pressure oil chamber is arranged on the inner side of the guide sleeve, and the throttle of the piston rod is easy to be blocked and difficult to replace. Utility Model Content

[0004] One of the purposes of the utility model is to provide a detachable throttle, which solves the problem that the capillary tube is easily blocked due to the limited rigidity of the existing throttle.

[0005] In order to achieve the above utility model purpose, the technical solution adopted by the utility model is as follows:

[0006] A detachable throttle comprises a shell, a first plug and a capillary, wherein a liquid channel is provided in the shell, the capillary is arranged in the liquid channel, the first plug is sleeved on the outer wall of the capillary, and the first plug is arranged close to one end of the shell, and further comprises a sealing ring, the sealing ring is sleeved on the outer wall of the capillary, one end face of the sealing ring abuts against one end of the first plug, and the outer wall of the sealing ring abuts against the inner wall of the liquid channel, thereby playing a role of shock absorption and energy absorption, thereby extending the service life of the capillary.

[0007] Furthermore, it includes a second plug, which is set on the outer wall of the capillary and is arranged close to the other end of the liquid channel. The other end face of the sealing ring is in contact with the end face of the second plug. Bidirectional positioning is performed by the two plugs, which is convenient for adjustment.

[0008] Preferably, the sealing ring is an O-ring, which has low cost of use.

[0009] Furthermore, it also includes a filler, which is arranged between the first plug and the capillary and between the second plug and the capillary to prevent hydraulic leakage and improve the rigidity of the capillary, so that the capillary is not easily blocked by bending.

[0010] Furthermore, the filler is epoxy resin glue, which is oil-resistant and corrosion-resistant.

[0011] Preferably, the inner wall of the liquid channel is provided with an internal thread, and the first plug is spirally connected in the liquid channel to adjust the depth position accurately.

[0012] More preferably, one end of the capillary tube passes through the second plug and extends to the outside of the housing for connecting to an external hydraulic element.

[0013] More preferably, the first plug includes a countersunk hole and a through hole, the countersunk hole is arranged on the outward end surface of the first plug, and the through hole penetrates the first plug along the axial direction of the first plug, so as to facilitate quick disassembly and assembly.

[0014] More preferably, the through hole and the capillary gap cooperate with each other to facilitate assembly and disassembly.

[0015] The second purpose of the utility model is to provide a hydrostatic bearing, which solves the problem that the hydraulic oil of the existing hydrostatic bearing is easy to be blocked and difficult to replace.

[0016] In order to achieve the above utility model purpose, the technical solution adopted by the utility model is as follows:

[0017] A static pressure bearing, comprising the detachable throttle, can prolong service life and reduce maintenance frequency.

[0018] The beneficial effects of the utility model are:

[0019] (1) A liquid channel is provided in the housing of the detachable throttle, and a capillary tube, a plug and a sealing ring are installed in the liquid channel. The capillary tube is arranged in the liquid channel for adjusting the hydraulic pressure passing through the capillary tube. The plug and the sealing ring are sleeved on the outer wall of the capillary tube. The plug is used for detachably installing the capillary tube. The sealing ring presses the capillary tube inward under the pressure of the plug. At the same time, the sealing ring can buffer the impact of the plug and play a role in protecting the capillary tube.

[0020] (2) The capillary tube and the two plugs of the detachable throttle are filled with fillers to improve the strength of the capillary tube and prevent the capillary tube from being blocked. The other two plugs are connected in the liquid channel through threads to locate the positions of the capillary tube and the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 An axonometric view of a detachable throttle provided by the utility model;

[0022] Figure 2 A front view of a detachable throttle provided by the utility model;

[0023] Figure 3 It is a cross-sectional view of the utility model along line AA.

[0024] Reference numerals:

[0025] 1. First plug; 11. Countersunk hole; 12. Through hole; 2. Capillary; 3. Sealing ring; 4. Second plug; 5. Filler; 6. Shell; 61. Liquid channel; 62. Internal thread. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] like Figure 1-Figure 3As shown, the present embodiment discloses a detachable throttle including a shell 6, a first plug 1 and a capillary 2, a liquid channel 61 is provided in the shell 6, the capillary 2 is arranged in the liquid channel 61, the first plug 1 is sleeved on the outer wall of the capillary 2, and the first plug 1 is arranged close to one end of the shell 6, and also includes a sealing ring 3, the sealing ring 3 is sleeved on the outer wall of the capillary 2, one end face of the sealing ring 3 is in contact with one end of the first plug 1, and the outer wall of the sealing ring 3 is in contact with the inner wall of the liquid channel 61, the first plug 1 is detachably connected to the liquid channel 61, and the capillary 2 can be easily replaced, and the pressure of squeezing the sealing ring 3 can be adjusted by adjusting the depth of the first plug 1 in the liquid channel 61, and the sealing ring 3 is in close contact with the inner wall of the liquid channel 61 and the capillary 2 under extrusion, so as to play a buffering role and prevent the first plug 1 from loosening during long-term use.

[0028] The capillary tube 2 controls the flow rate of the liquid and maintains the pressure difference by relying on the pressure drop caused by its flow resistance along the length direction, thereby playing the role of reducing the pressure of the high-pressure oil circuit.

[0029] Furthermore, it also includes a second plug 4, which is sleeved on the outer wall of the capillary 2, and the second plug 4 is arranged close to the other end of the liquid channel 61. The other end face of the sealing ring 3 is in contact with the end face of the second plug 4. By adjusting the depth of the first plug 1 and the second plug 4 in the liquid channel 61, the position of the sealing ring 3 in the liquid channel 61 can be adjusted to achieve two-way positioning.

[0030] Preferably, the sealing ring 3 is an O-ring, which is easy to manufacture and has low cost.

[0031] It also includes a filler 5, which is arranged between the first plug 1 and the capillary 2 and between the second plug 4 and the capillary 2. The filler 5 is epoxy resin glue. The filler 5 seals the gap between the first plug 1 and the second plug 4 and the outer wall of the capillary 2. The filler 5 is used to bond the capillary 2 to strengthen the rigidity of the capillary 2, prevent the capillary 2 from being blocked due to bending and deformation, and extend the service life of the throttle.

[0032] Preferably, the inner wall of the liquid channel 61 is provided with an internal thread 62, the first plug 1 is threadedly connected in the liquid channel 61, and the second plug 4 is threadedly connected in the liquid channel 61, so as to facilitate and quickly replace the capillary 2.

[0033] More preferably, one end of the capillary tube 2 passes through the second plug 4 and extends to the outside of the housing 6, and can be connected to other hydraulic components for use.

[0034] More preferably, the first plug 1 includes a countersunk hole 11 and a through hole 12, the countersunk hole 11 is arranged on the outward end surface of the first plug 1, and the through hole 12 penetrates the first plug 1 along the axial direction of the first plug 1, the countersunk hole 11 is used for disassembly and assembly, and the through hole 12 is used to accommodate the capillary 2, and the through hole 12 is clearance-matched with the capillary 2.

[0035] The disassembly and assembly process of the removable throttle is as follows:

[0036] Screw the second plug 4 into the liquid channel 61 of the shell 6, adjust the depth of the second plug 4 to determine the fixed position of the sealing ring 3, put the sealing ring 3 into the liquid channel 61, make one end face of the sealing ring 3 contact with the end face of the second plug 4, and then screw the first plug 1 into the liquid channel 61 until the end face of the first plug 1 contacts with the other end face of the sealing ring 3, then apply the filler 5 on the outer wall of the capillary 2, and then insert it into the liquid channel 61 along the through hole 12, so that the end of the capillary 2 is flush with the end face of the shell 6, screw the second plug 4 inward to squeeze the sealing ring 3 to press the capillary 2, and wait for the filler 5 to solidify.

[0037] Embodiment 2

[0038] The present embodiment discloses a hydrostatic bearing, including a detachable throttle, which has a simple structure, has a shock-absorbing effect, is detachable and easy to maintain, and prolongs the service life of the hydrostatic bearing.

[0039] According to the disclosure and teaching of the above description, the technical personnel in the field of the utility model can also change and modify the above implementation. Therefore, the utility model is not limited to the specific implementation methods disclosed and described above, and some modifications and changes of the utility model should also fall within the scope of protection of the claims of the utility model. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the utility model.

Claims

1. A detachable throttle, comprising a housing (6), a first plug (1) and a capillary tube (2), wherein a liquid channel (61) is provided in the housing (6), the capillary tube (2) is arranged in the liquid channel (61), the first plug (1) is sleeved on the outer wall of the capillary tube (2), and the first plug (1) is arranged close to one end of the housing (6), characterized in that: It also includes a sealing ring (3), which is sleeved on the outer wall of the capillary (2), one end face of the sealing ring (3) abuts against one end of the first plug (1), and the outer wall of the sealing ring (3) abuts against the inner wall of the liquid channel (61).

2. The detachable throttle according to claim 1, characterized in that: It also includes a second plug (4), which is sleeved on the outer wall of the capillary (2), and the second plug (4) is arranged close to the other end of the liquid channel (61), and the other end face of the sealing ring (3) is in contact with the end face of the second plug (4).

3. The detachable throttle according to claim 2, characterized in that: The sealing ring (3) is an O-ring.

4. The detachable restrictor according to claim 2, characterized in that: It also comprises a filler (5), wherein the filler (5) is arranged between the first plug (1) and the capillary (2) and between the second plug (4) and the capillary (2).

5. The detachable restrictor according to claim 4, characterized in that: The filler (5) is epoxy resin glue.

6. The detachable restrictor according to claim 5, characterized in that: The inner wall of the liquid channel (61) is provided with an internal thread (62), and the first plug (1) is spirally connected in the liquid channel (61).

7. The detachable restrictor according to claim 2, characterized in that: One end of the capillary tube (2) passes through the second plug (4) and extends to the outside of the housing (6).

8. The detachable restrictor according to claim 7, characterized in that: The first plug (1) comprises a countersunk hole (11) and a through hole (12); the countersunk hole (11) is arranged on the outward end surface of the first plug (1); and the through hole (12) penetrates the first plug (1) along the axial direction of the first plug (1).

9. The detachable restrictor according to claim 8, characterized in that: The through hole (12) and the capillary tube (2) are clearance-matched.

10. A hydrostatic bearing, characterized in that: Comprising a detachable restrictor according to any one of claims 1-9.

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