Throttling device for continuously and stably adjusting hydraulic oil pressure

Abstract

The utility model provides a throttling device for continuously and stably adjusting hydraulic oil pressure, which is characterized in that a throttling column mounting hole is formed in the center of a base, a throttling column is mounted in the throttling column mounting hole, a first throttling hole is formed in the center of the throttling column, the upper part of the first throttling hole is communicated with an annular groove through a first radial hole, and the lower part of the first throttling hole is communicated with a second radial hole; an oil inlet used for being communicated with the annular groove is machined in the base, the bottom end of the first throttling hole is communicated with a second radial hole, the tail end of the second radial hole is arranged on a step face, and the step face is machined at the bottom end of the throttling column. A second throttling hole is machined in the bottom end of the throttling column mounting hole and can be matched with the bottom end face of the throttling column. The bottom end of the second throttling hole is communicated with an oil outlet in the base. The throttling column is rotated through an inner hexagonal hole in the upper end of the throttling column to change the effective oil passing area of an oil outlet of the second throttling hole, fine adjustment throttling is carried out, and the needed pressure ratio is achieved till the ratio of the oil outlet pressure P2 to the oil inlet pressure P1 meets the design requirement.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic systems, in particular to a throttling device for continuously and stably regulating hydraulic oil pressure. Background Art

[0002] The throttling control methods of hydraulic oil pressure used in traditional machine tools or some moving mechanisms for controlling static pressure during rotation and sliding include capillary throttling, small hole throttling and separate throttling valve core throttling. Capillary throttling is to connect the corresponding oil inlet and oil outlet through customized special stainless steel thin steel pipes, and achieve throttling through the very small inner hole of the special stainless steel thin steel pipe. This throttling method can generally only achieve the required pressure ratio by changing the length of the throttling oil circuit, so the effect is relatively poor; small hole throttling is to directly process a small hole at the oil outlet, and throttle through the small hole to achieve the required pressure ratio. This method is mainly unable to change the cross-sectional area or length of the throttling oil circuit. If it does not work, the corresponding parts can only be remade, and the adjustment cycle is long and quite troublesome; separate throttling valve core throttling requires changing the depth of the thread groove on the flow valve core. Usually, a batch of throttling valve cores with different thread depths are processed for backup, which is convenient for replacement when adjusting the pressure. It is relatively time-consuming and costly. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned shortcomings and provide a throttling device for adjusting the hydraulic oil pressure continuously and stably. Through this device and method, it is only necessary to select a suitable cross-sectional area of ​​the throttling hole 1 on the throttling column for throttling once in actual application, and to rotate the throttling column through the inner hexagonal hole at the upper end of the throttling column to change the effective oil flow area of ​​the oil outlet of the throttling hole 2 to fine-tune the flow to achieve the required pressure ratio, until the ratio of the oil outlet pressure P2 to the oil inlet pressure P1 reaches the design requirements. The whole process is simple to operate, continuously adjustable, stable and reliable, and has obvious effects.

[0004] In order to realize the above-mentioned technical features, the purpose of the utility model is realized as follows: a throttling device for continuously and stably adjusting the hydraulic oil pressure comprises a base, a throttling column mounting hole is processed at the central part of the base, a throttling column is installed inside the throttling column mounting hole, a throttling hole 1 is processed at the central part of the throttling column, the upper part of the throttling hole 1 is connected with the annular groove through the first radial hole, an oil inlet for connecting with the annular groove is processed on the base, the bottom end of the throttling hole 1 is connected with the second radial hole, the end of the second radial hole is arranged on a step surface, and the step surface is processed on the bottom end of the throttling column; a throttling hole 2 is processed at the bottom end of the throttling column mounting hole, the throttling hole 2 can cooperate with the bottom end surface of the throttling column and adjust the flow area of ​​the throttling hole 2; the bottom end of the throttling hole 2 is connected with the oil outlet on the base.

[0005] A threaded hole is processed inside the base and located at the top of the throttling column installation hole, and a threaded plug for pressing the throttling column is installed inside the threaded hole.

[0006] The top end of the throttling column is transitionally provided with a stepped hole, and the top end of the stepped hole is provided with an inner hexagonal hole.

[0007] The bottom end of the throttling column is processed with a bottom annular groove, and the step surface is equal to the bottom annular groove in height.

[0008] The utility model has the following beneficial effects:

[0009] 1. The device and method of the utility model can be used to adjust the throttling of hydraulic oil pressure, and can be well applied to the adjustment of static pressure of machine tools or some motion mechanisms during rotation and sliding, so as to improve their motion rigidity.

[0010] 2. The utility model utilizes the throttling hole 1 on the throttling column to perform primary throttling, and rotates the throttling column through the hexagonal hole on the upper end of the throttling column to change the effective oil flow area of ​​the oil outlet of the throttling hole 2 to perform secondary throttling fine adjustment, so as to achieve the ratio of the oil outlet pressure P2 to the oil inlet pressure P1 required by the design.

[0011] 3. The utility model is easy to install and adjust. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0013] Figure 1 It is a sectional view of the overall structure of the throttling device of the utility model.

[0014] Figure 2 This is a three-dimensional diagram of the throttling column of the utility model from the first perspective.

[0015] Figure 3 This is a three-dimensional diagram of the throttling column of the utility model from the second viewing angle.

[0016] In the figure: base 1, oil inlet 2, throttle column mounting hole 3, throttle hole 2 4, oil outlet 5, threaded plug 6, threaded hole 7, inner hexagonal hole 8, stepped hole 9, annular groove 10, first radial hole 11, throttle hole 1 12, throttle column 13, bottom annular groove 14, second radial hole 15, stepped surface 16. DETAILED DESCRIPTION

[0017] The embodiments of the present utility model are further described below in conjunction with the accompanying drawings.

[0018] Embodiment 1:

[0019] See also Figure 1-3A throttling device for continuously and stably adjusting the hydraulic oil pressure comprises a base 1, a throttling column mounting hole 3 is processed at the central part of the base 1, a throttling column 13 is installed inside the throttling column mounting hole 3, a throttling hole 12 is processed at the central part of the throttling column 13, the upper part of the throttling hole 12 is connected with the annular groove 10 through the first radial hole 11, an oil inlet 2 for connecting with the annular groove 10 is processed on the base 1, the bottom end of the throttling hole 12 is connected with the second radial hole 15, the end of the second radial hole 15 is arranged on the step surface 16, and the step surface 16 is processed at the bottom end of the throttling column 13; a throttling hole 2 4 is processed at the bottom end of the throttling column mounting hole 3, the throttling hole 2 4 can cooperate with the bottom end surface of the throttling column 13 and adjust the flow area of ​​the throttling hole 2 4; the bottom end of the throttling hole 2 4 is connected with the oil outlet 5 on the base 1. By adopting the above-mentioned throttling device, it uses the throttling hole 1 on the throttling column to perform primary throttling, and changes the effective oil flow area of ​​the second oil outlet of the throttling hole by rotating the throttling column to perform secondary throttling fine-tuning, so as to achieve the ratio of the design required oil outlet pressure P2 to the oil inlet pressure P1, thereby controlling the static pressure of the machine tool or some moving mechanisms during rotation and sliding to improve their movement rigidity. It is continuously adjustable, has stable precision and a wide range of applications.

[0020] Furthermore, a threaded hole 7 is machined inside the base 1 and located at the top of the throttle column mounting hole 3, and a threaded plug 6 for compressing the throttle column 13 is installed inside the threaded hole 7. The throttle column 13 can be axially positioned by the threaded plug 6, ensuring that the end face of the throttle column 13 fits with the end face of the throttle column mounting hole 3, the threaded plug 6 fits with the end face of the throttle column 13, and the hydraulic oil does not pass through the matching end faces.

[0021] Furthermore, the top of the throttle column 13 is provided with a stepped hole 9, and the top of the stepped hole 9 is provided with an inner hexagonal hole 8. The inner hexagonal hole 8 facilitates the subsequent rotation of the throttle column 13, thereby adjusting the effective oil flow area of ​​the throttle hole 24.

[0022] Furthermore, a bottom annular groove 14 is processed at the bottom end of the throttle column 13, and the step surface 16 is equal in height to the bottom annular groove 14. The bottom annular groove 14 ensures that a certain amount of oil can be stored.

[0023] Embodiment 2:

[0024] A throttling method for continuously and stably adjusting the hydraulic oil pressure, the throttling method is implemented by using the throttling device, and specifically includes:

[0025] In actual application, a suitable cross-sectional area of ​​the throttling hole 12 on the throttling column 13 is selected for primary throttling, and the effective oil flow area of ​​the oil outlet of the throttling hole 2 4 is changed by rotating the throttling column 13 to perform secondary throttling fine-tuning to achieve the required pressure ratio, until the ratio of the oil outlet pressure P2 to the oil inlet pressure P1 reaches the design requirement.

[0026] Embodiment 3:

[0027] The throttling method specifically comprises the following steps:

[0028] Step 1, installation of the throttle column 13:

[0029] Select the corresponding throttle column 13, and install the throttle column 13 as a whole into the throttle column mounting hole 3 of the base 1 until the bottom. The outer circle of the throttle column 13 and the throttle column mounting hole 3 are designed to have a transition fit tolerance to ensure that the hydraulic oil does not pass through the matching hole;

[0030] Step 2, adjustment of the throttle column 13:

[0031] The hydraulic oil enters the annular groove 10 on the throttling column 13 through the oil inlet 2 on the base 1, and performs a throttling along the throttling hole 12 on the throttling column 13. Since there is a certain eccentricity between the throttling hole 2 4 and the throttling column 13, and the step surface 16 is processed on the throttling column 13, when the throttling column 13 is rotated through the inner hexagonal hole 8 at the upper end of the throttling column 13, the end surface of the throttling column 13 gradually blocks the oil outlet of the throttling hole 2 4, and the oil outlet area gradually becomes smaller. By changing the effective oil flow area of ​​the oil outlet of the throttling hole 2 4, the secondary throttling fine adjustment is realized, and a certain throttling ratio of the hydraulic oil is realized, so as to achieve the ratio of the oil outlet pressure P2 to the oil inlet pressure P1 required by the design;

[0032] Step 3: Installation of threaded plug 6:

[0033] After the throttle column 13 is adjusted, the threaded plug 6 is installed to axially position the throttle column 13 to ensure that the end face of the throttle column 13 fits with the end face of the throttle column mounting hole 3, the threaded plug 6 fits with the end face of the throttle column 13, and the hydraulic oil does not pass through the matching end faces;

[0034] Step 4: Normal operation:

[0035] The oil inlet 2 of the base 1 is connected to the oil supply machine through an oil pipe, and the oil outlet 5 of the base 1 is connected to the static pressure oil chamber of a machine tool or some moving mechanism during rotation and sliding through an oil pipe.

Claims

1. A throttling device for continuously and stably regulating the hydraulic oil pressure, characterized in that: The invention comprises a base (1), a throttling column mounting hole (3) is processed at the center of the base (1), a throttling column (13) is installed inside the throttling column mounting hole (3), a throttling hole (12) is processed at the center of the throttling column (13), the upper part of the throttling hole (12) is connected to the annular groove (10) through a first radial hole (11), an oil inlet (2) for connecting to the annular groove (10) is processed on the base (1), and the bottom end of the throttling hole (12) is connected to the annular groove (10). The second radial hole (15) is connected to the second radial hole (15), the end of the second radial hole (15) is arranged on a stepped surface (16), and the stepped surface (16) is processed on the bottom end of the throttling column (13); the bottom end of the throttling column mounting hole (3) is processed with a throttling hole (4), the throttling hole (4) can match with the bottom end surface of the throttling column (13) and adjust the flow area of ​​the throttling hole (4); the bottom end of the throttling hole (4) is connected to the oil outlet (5) on the base (1).

2. A throttling device for continuously and stably adjusting the hydraulic oil pressure according to claim 1, characterized in that: A threaded hole (7) is machined inside the base (1) and located at the top of the throttling column mounting hole (3), and a threaded plug (6) for pressing the throttling column (13) is installed inside the threaded hole (7).

3. A throttling device for continuously and stably adjusting the hydraulic oil pressure according to claim 1, characterized in that: The top end of the throttling column (13) is provided with a stepped hole (9) in transition, and the top end of the stepped hole (9) is provided with an inner hexagonal hole (8).

4. A throttling device for continuously and stably adjusting the hydraulic oil pressure according to claim 1, characterized in that: The bottom end of the throttling column (13) is processed with a bottom annular groove (14), and the step surface (16) and the bottom annular groove (14) are of equal height.

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