Pressure regulating diaphragm positive feedback type hydraulic flow controller

Abstract

The invention discloses a pressure regulating diaphragm positive feedback type hydraulic flow controller which is characterized in that an oil inlet pipe is arranged on a controller body, one end of the oil inlet pipe is connected with oil conveying equipment, the other end of the oil inlet pipe is communicated with the bottom of a center hole, the top of the center hole is arranged in an annular cavity in a penetrating mode, and one side of the bottom of the annular cavity is communicated with an oil outlet pipe inlet; the oil outlet pipe outlet is connected with an external guide rail pair; the top of the annular cavity is covered with a spring diaphragm, an oil groove hole is formed in the spring diaphragm, and the oil groove hole abuts against the end face of the center hole, so that the oil groove hole and the center hole form small hole throttling, and the end face of the center hole and the spring diaphragm form gap throttling; a spring installation cavity is formed in the top face of the spring diaphragm, and a die spring used for adjusting the deformation amount of the spring diaphragm is arranged in the spring installation cavity. The hydrostatic pressure throttling device can adapt to hydrostatic pressure cavities with different machining and assembling errors, is of a hydrostatic pressure throttling device structure with small hole throttling diaphragm gap throttling and positive feedback superposition, and has extremely high adaptability and high rigidity guarantee for the hydrostatic pressure cavities.

Description

Technical Field

[0001] The invention relates to the field of static pressure technology, and in particular to a pressure regulating diaphragm positive feedback type hydraulic flow controller. Background Art

[0002] At present, hydrostatic technology mostly involves hydraulic throttles. For the hydrostatic cavity of the hydrostatic guide rail, there are many types of hydraulic throttle structures, including small hole throttles, capillary throttles, gap throttles, diaphragm throttles, internal feedback throttles, etc. Through the use of these types of throttles, the hydrostatic guide rail is guaranteed to have greater rigidity, higher guide rail straightness, better damping and shock absorption characteristics, and longer service life.

[0003] However, the above-mentioned throttles in the prior art either have no positive feedback, resulting in low stiffness of the liquid hydrostatic chamber, or have unstable material properties and processing technology, resulting in large deviations between actual tests after production and previously calculated values, and unsatisfactory parameter matching during application, making it difficult to assemble and adjust the liquid hydrostatic guide rail. Summary of the invention

[0004] The purpose of the present invention is to provide a pressure regulating diaphragm positive feedback hydraulic flow controller to solve the above technical problems.

[0005] To achieve the above-mentioned purpose, the present invention provides a pressure regulating diaphragm positive feedback hydraulic flow controller, comprising: a controller body, wherein an oil inlet pipe is arranged on the controller body, one end of the oil inlet pipe is used to connect to an external oil delivery device, the other end of the oil inlet pipe is connected to the bottom of a center hole, the center hole is vertically arranged inside the controller body, the top of the center hole is penetrated and arranged in an annular cavity, one side of the bottom of the annular cavity is connected to an oil outlet pipe inlet, and the oil outlet pipe outlet is used to connect to an external guide rail pair;

[0006] The top of the annular cavity is covered with a spring diaphragm, an oil groove hole is provided on the spring diaphragm, the oil groove hole abuts against the end surface of the center hole, so that the oil groove hole and the center hole form a small hole throttling, and the end surface of the center hole and the spring diaphragm form a gap throttling;

[0007] A spring installation cavity is arranged on the top surface of the spring diaphragm, and a mold spring for adjusting the deformation amount of the spring diaphragm is arranged in the spring installation cavity.

[0008] Compared with the prior art, the pressure regulating diaphragm positive feedback hydraulic flow controller of the present invention has at least the following advantages:

[0009] The present invention can adapt to liquid static pressure chambers with different processing and assembly errors by adjusting the spring pressure. At the same time, it is a liquid static pressure throttle structure with small hole throttling diaphragm gap throttling superimposed positive feedback, which has extremely strong adaptability and high rigidity guarantee for the liquid static pressure chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 An isometric view of a pressure regulating diaphragm positive feedback hydraulic flow controller provided by an embodiment of the present invention;

[0011] Figure 2 for Figure 1 A cross-sectional view of

[0012] Figure 3 for Figure 1 A top view of

[0013] Figure 4 for Figure 1 The main view of

[0014] Figure 5 for Figure 1 Schematic diagram of the structure of the spring diaphragm. DETAILED DESCRIPTION

[0015] The technical scheme of the present invention will be clearly and completely described below in conjunction with specific embodiments, but those skilled in the art should understand that the embodiments described below are only used to illustrate the present invention and should not be regarded as limiting the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] like Figure 1-2 As shown, the pressure regulating diaphragm positive feedback hydraulic flow controller provided by the embodiment of the present invention comprises: a controller body 1, wherein an oil inlet pipe 2 is arranged on the controller body 1, one end of the oil inlet pipe 2 is used to connect to an external oil delivery device, and the other end of the oil inlet pipe 2 is connected to the bottom of a center hole 3, the center hole 3 is vertically arranged inside the controller body 1, the top of the center hole 3 is penetrated and arranged in an annular cavity 4, one side of the bottom of the annular cavity 4 is connected to the inlet of an oil outlet pipe 5, and the outlet of the oil outlet pipe 5 is used to connect to an external guide rail pair;

[0017] The top of the annular cavity 4 is covered with a spring diaphragm 6, on which an oil groove hole 7 is provided, and the oil groove hole 7 abuts against the end surface of the center hole 3, so that the oil groove hole 7 and the center hole 3 form a small hole throttling, and the end surface of the center hole 3 and the spring diaphragm 6 form a gap throttling;

[0018] A spring installation cavity is arranged on the top surface of the spring diaphragm 6 , and a mold spring 8 for adjusting the deformation amount of the spring diaphragm 6 is arranged in the spring installation cavity.

[0019] In the embodiment of the present invention, the end face of the center hole 3 and the spring diaphragm 6 are provided to form a gap throttling, so that when the guide rail slide is subjected to force and the gap between the throttling edge of the liquid static pressure chamber and the guide rail surface becomes smaller, the liquid pressure in the annular cavity will increase, the spring diaphragm 6 will deform upward, the gap between the spring diaphragm 6 and the end face of the center hole 3 will increase, the throttling resistance will decrease, and the high-pressure liquid will be quickly replenished to increase the liquid pressure in the annular cavity, thereby realizing positive feedback on the load change of the liquid static pressure chamber, forcing the gap between the throttling edge of the liquid static pressure chamber and the guide rail surface to increase close to the original value, which is reflected in the high rigidity of the guide rail pair;

[0020] At the same time, there will be certain errors in the processing and assembly of the guide rail pair, and this error usually affects the pressure value of the liquid static pressure chamber. By adjusting the top screw 11 to change the pressure of the mold spring 8 on the spring diaphragm 6, the basic working pressure of the liquid static pressure chamber can be set to make the pressure of each liquid static pressure chamber of the guide rail pair consistent, which is convenient for maintaining the balanced force of the guide rail pair, reducing deformation caused by uneven force caused by errors, and ensuring the long-term stable operation of the guide rail pair.

[0021] Obviously, the embodiment of the present invention can adapt to liquid static pressure chambers with different processing and assembly errors by adjusting the spring pressure. At the same time, it is a liquid static pressure throttle structure with small hole throttling diaphragm gap throttling superimposed on positive feedback, which has extremely strong adaptability and high rigidity guarantee for the liquid static pressure chamber.

[0022] In addition, the embodiment of the present invention has a simple structure, reliable control, and simple operation.

[0023] In the embodiment of the present invention, Figure 1 As shown, the controller body 1 can be set as a cylindrical structure to facilitate assembly, processing, etc.;

[0024] An oil inlet hole may be provided on one side of the top surface of the controller body 1, and the oil inlet hole may be provided as a stepped hole with a diameter gradually decreasing from the top to the bottom, so as to facilitate oil conduction;

[0025] The bottom of the oil inlet hole is connected to the top of the oil inlet pipe 2 . The oil inlet pipe 2 can be set as a right-angle structure, and the bottom end of the oil inlet pipe 2 is connected to the bottom of the center hole 3 .

[0026] Obviously, since the oil inlet hole is set as a stepped hole and the oil inlet pipe 2 is of a right-angle structure, the oil path can be unblocked, and the oil can quickly enter the center hole 3.

[0027] In the embodiment of the present invention, the oil outlet pipe 5 is vertically arranged inside the controller body 1, the inlet of the oil outlet pipe 5 is connected to the annular cavity 4, and the outlet of the oil outlet pipe 5 extends to the bottom end surface of the controller body 1 to facilitate communication with the external guide rail pair.

[0028] In the embodiment of the present invention, one end of the pressure detection oil circuit 9 is connected to the oil outlet pipe 5, and the pressure detection oil circuit 9 can be set as a right-angle structure. The other end of the pressure detection oil circuit 9 extends toward the top surface of the controller body 1 and is connected to the bottom of the pressure detection mounting hole set on one side of the top surface of the controller body 1. A pressure detection instrument can be set in the pressure detection mounting hole, and the pressure detection mounting hole can be set as a tapered hole.

[0029] Obviously, by providing the pressure detection oil circuit 9, the oil pressure can be detected in time, thereby facilitating rapid regulation.

[0030] In the embodiment of the present invention, Figure 2 , 3 As shown in 4, a vertical spring hole can be provided on the controller body 1 between the oil inlet hole and the pressure detection mounting hole;

[0031] A first internal thread is arranged on the inner wall of the spring hole, a clamping nut 10 is arranged in the spring hole, a first external thread is arranged on the outer wall of the clamping nut 10, and the clamping nut 10 is fixed in the spring hole through the first external thread and the first internal thread;

[0032] The compression nut 10 is set as a hollow structure, the inner wall of the compression nut 10 is provided with a second internal thread, a top screw 11 is set in the compression nut 10, and the outer wall of the top screw 11 is provided with a second external thread. The top screw 11 is arranged in the compression nut 10 through the second external thread and the second internal thread. The vertical distance between the second external thread and the second internal thread can be adjusted;

[0033] The top screw 11 includes a top cap and a bottom hollow structure. The bottom hollow structure serves as a spring mounting cavity to accommodate the mold spring 8. The top end of the mold spring 8 abuts against the bottom surface of the cap, and the bottom end of the mold spring 8 abuts against the top surface of the spring diaphragm 6. The cap extends to the outside of the controller body 1 for easy screwing.

[0034] It can be seen that the interaction between the three forces, namely the liquid pressure in the annular cavity 4, the pre-pressure of the mold spring 8 and the stiffness of the spring diaphragm 6, determines the deformation of the spring diaphragm 6, and at the same time maintains a balance between the spring diaphragm 6, the mold spring 8 and the liquid pressure in the annular cavity, so that the pressure of each liquid static pressure cavity of the guide rail pair is consistent.

[0035] Obviously, by adjusting the top screw 11, the pressure of the mold spring 8 on the spring diaphragm 6 can be controlled, thereby setting the basic working pressure in the liquid static pressure cavity, and then adapting to the liquid static pressure cavity with different processing and assembly errors.

[0036] In the embodiment of the present invention, Figure 5 As shown, the spring diaphragm 6 can be set as a circular structure, and a long oil groove hole 7 can be set in the middle position of the spring diaphragm 6, so that the oil groove hole 7 and the center hole 3 form a small hole throttling, and the spring diaphragm 6 and the end surface of the center hole 3 form a gap throttling.

[0037] In order to clearly and thoroughly understand the pressure regulating diaphragm positive feedback hydraulic flow controller provided by the embodiment of the present invention, the principle thereof is further described below in combination with a detailed use process:

[0038] After the pressure regulating diaphragm positive feedback type hydraulic flow controller provided by the embodiment of the present invention is assembled with the guide rail pair, the high-pressure liquid flows into the oil inlet pipe 2, flows along the oil inlet pipe 2 to the end face of the center hole 3, and this end face and the oil groove hole 7 on the spring diaphragm 6 form a small hole throttling, and the liquid enters the annular cavity 4 through the throttling, and continues to flow through the oil outlet pipe 5 into the liquid static pressure cavity;

[0039] At this time, the liquid pressure in the static pressure chamber and the annular chamber is equal, and the liquid pressure can be detected by the pressure detection instrument in the pressure detection installation hole;

[0040] The liquid in the annular cavity 4 causes the spring diaphragm 6 to deform upward. The amount of deformation is related to the stiffness of the spring diaphragm 6 and the pre-pressure of the mold spring 8. The spring diaphragm 6, the mold spring 8 and the liquid pressure in the annular cavity maintain a balance.

[0041] A gap throttling is formed between the spring diaphragm 6 and the end face of the center hole 3. When the guide rail slide is subjected to force, the gap between the throttling edge of the liquid static pressure chamber and the guide rail surface becomes smaller, and the liquid pressure in the annular cavity will increase. The spring diaphragm 6 will further deform upward, making the throttling gap larger and the throttling resistance smaller. The high-pressure liquid is quickly replenished to increase the liquid pressure in the annular cavity, realizing positive feedback on the load change of the liquid static pressure chamber, forcing the gap between the throttling edge of the liquid static pressure chamber and the guide rail surface to become larger and close to the original value, which is reflected in the high stiffness of the guide rail pair.

[0042] In addition, there will be certain errors in the processing and assembly of the guide rail pair, and this error usually affects the pressure value of the liquid static pressure chamber. By adjusting the top screw 11 to change the pressure of the mold spring 8 on the spring diaphragm 6, the basic working pressure of the liquid static pressure chamber can be set to make the pressure of each liquid static pressure chamber of the guide rail pair consistent, which is convenient for maintaining the balanced force of the guide rail pair, reducing deformation caused by uneven force caused by errors, and ensuring the long-term stable operation of the guide rail pair.

[0043] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made on the basis of the present invention. Therefore, these modifications or improvements made on the basis of not departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A pressure regulating diaphragm positive feedback hydraulic flow controller, characterized in that: include: A controller body, wherein an oil inlet pipe is arranged on the controller body, one end of the oil inlet pipe is used to connect to an external oil delivery device, the other end of the oil inlet pipe is communicated with the bottom of the center hole, the center hole is vertically arranged inside the controller body, the top of the center hole is penetrated and arranged in an annular cavity, one side of the bottom of the annular cavity is communicated with an oil outlet pipe inlet, and the oil outlet pipe outlet is used to connect to an external guide rail pair; The top of the annular cavity is covered with a spring diaphragm, an oil groove hole is provided on the spring diaphragm, the oil groove hole abuts against the end surface of the center hole, so that the oil groove hole and the center hole form a small hole throttling, and the end surface of the center hole and the spring diaphragm form a gap throttling; A spring installation cavity is arranged on the top surface of the spring diaphragm, and a mold spring for adjusting the deformation amount of the spring diaphragm is arranged in the spring installation cavity.

2. The pressure regulating diaphragm positive feedback hydraulic flow controller according to claim 1 is characterized in that: An oil inlet hole is arranged on one side of the top surface of the controller body, the bottom of the oil inlet hole is connected to the top of the oil inlet pipe, the oil inlet pipe is arranged to be a right-angle structure, and the bottom end of the oil inlet pipe is connected to the bottom of the center hole.

3. The pressure regulating diaphragm positive feedback hydraulic flow controller according to claim 1, characterized in that: The oil outlet pipe is vertically arranged inside the controller body, the oil outlet pipe inlet is connected to the annular cavity, and the oil outlet pipe outlet extends to the bottom end surface of the controller body.

4. The pressure regulating diaphragm positive feedback hydraulic flow controller according to claim 1, characterized in that: The oil outlet pipe is connected to one end of a pressure detection oil circuit, and the pressure detection oil circuit is arranged in a right-angle structure. The other end of the pressure detection oil circuit extends toward the top surface of the controller body and is connected to the bottom of a pressure detection mounting hole arranged on one side of the top surface of the controller body. A pressure detection instrument is arranged in the pressure detection mounting hole.

5. The pressure regulating diaphragm positive feedback hydraulic flow controller according to claim 1, characterized in that: A vertical spring hole is provided on the controller body; a first internal thread is provided on the inner wall of the spring hole, a clamping nut is provided in the spring hole, a first external thread is provided on the outer wall of the clamping nut, and the clamping nut is fixed in the spring hole through the first external thread and the first internal thread; The clamping nut is configured as a hollow structure, the inner wall of the clamping nut is configured with a second internal thread, a top screw is configured inside the clamping nut, a second external thread is configured on the outer wall of the top screw, and the top screw is configured in the clamping nut in an adjustable vertical distance through the second external thread and the second internal thread; The top screw includes a top cap and a bottom hollow structure, wherein the bottom hollow structure serves as the spring mounting cavity to accommodate the mold spring, the top end of the mold spring abuts against the bottom surface of the cap, the bottom end of the mold spring abuts against the top surface of the spring diaphragm, and the cap extends to the outside of the controller body.

6. The pressure regulating diaphragm positive feedback hydraulic flow controller according to claim 1, characterized in that: The spring diaphragm is configured as a circular structure.

7. The pressure regulating diaphragm positive feedback hydraulic flow controller according to claim 1, characterized in that: The middle position of the spring diaphragm is provided with the long strip oil groove hole.

8. The pressure regulating diaphragm positive feedback hydraulic flow controller according to claim 2, characterized in that: The oil inlet hole is configured as a stepped hole whose diameter decreases gradually from the top to the bottom.

9. The pressure regulating diaphragm positive feedback hydraulic flow controller according to claim 4, characterized in that: The pressure detection installation hole is configured as a tapered hole.

10. The pressure regulating diaphragm positive feedback hydraulic flow controller according to claim 5, characterized in that: The spring hole is vertically arranged on the controller body and is located between the oil inlet hole and the pressure detection installation hole.

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