CN201651619U - Static pressure feedback control type high-speed joint - Google Patents

Abstract

The utility model discloses a static pressure feedback control type high-speed joint, which comprises a shell, a rotating shaft, a rolling bearing, a stationary bushing and a rotating bushing, wherein the stationary bushing is connected with the shell, and is stationary; the rotating bushing is connected with the rotating shaft and rotates along with the shaft; a porous channel which is communicated inside is arranged between the stationary bushing and the rotating bushing, and the porous channel of the stationary bushing is communicated with an oil inlet and outlet; the porous channel of the rotating bushing is communicated with a flow channel in the rotating shaft; and an axial static pressure feedback gap is left between the stationary bushing and the rotating bushing. The utility model adopts the gap seal on the motive seal position of the joint, firstly introduces the static pressure feedback control mechanism to control the seal gap, makes the seal gap be kept unchanged under the external interference, leads the stationary part and the rotating part to always keep liquid friction, reduces the friction and wear, and prolongs the service life of the joint.

Description

Static pressure feedback control type high-speed joint

Technical field

The utility model relates to a kind of swivel joint, specifically is a kind of static pressure feedback control type high-speed joint.

Background technique

When needing water, gas, the various fluids of wet goods and pressure medium on the equipment of a rotation or the working platform, carry the pipeline equipment of can not following of these fluids together to rotate, swivel joint manufactures and designs for solving this difficult problem.In the existing rotary joint structure, the pipeline of fluid comprises oil outlet and filler opening, link to each other with fixed block, and revolving part rotates with equipment.The high-speed joint of domestic production at present generally adopts seal ring or clearance seal in motive sealing place (between fixed block and revolving part), if adopt the seal ring sealing, seal ring is easy to wear, and very difficult assurance does not produce leakage for a long time.If employing clearance seal, and seal clearance can change owing to external interference in the clearance seal, the variation of seal clearance can directly influence the performance of swivel joint again, cause parts depreciation aggravation, working life to be reduced, swivel joint leaks to be increased, the domestic solution of still not having maturation of this problem.

The model utility content

It is good that technical problem to be solved in the utility model provides a kind of sealability, the static pressure feedback control type high-speed joint of long service life.

A kind of static pressure feedback control type high-speed joint described in the utility model, it comprises housing, rotatingshaft, rolling bearing, described rotatingshaft is bearing in enclosure interior by rolling bearing, one end of rotatingshaft extends housing and links to each other with other rotating equipment, rotatingshaft inside has runner, runner one end extends housing with rotatingshaft and communicates with other rotating equipment, housing is provided with some oil inlet and outlets, swivel joint also is provided with stationary bushing and rotates lining, described stationary bushing links to each other with housing and maintains static, and the rotation lining links to each other with rotatingshaft and turns round with axle; Stationary bushing and rotate lining in the middle of be provided with the duct that communicates, and the duct of stationary bushing links to each other with oil inlet and outlet, and the duct of rotation lining links to each other with runner; Has axial static pressure feedback gap between stationary bushing and the rotation lining.

Described stationary bushing and rotation lining are made up of two parts respectively, and wherein two of stationary bushing parts are connected together by first group of screw, link to each other with housing through seal ring; Two parts that rotate lining are connected together by second group of screw, link to each other with rotatingshaft through seal ring.

Keep flowing of medium in order to make stationary bushing and to rotate lining in the process of relatively rotating, be provided with circular groove on the sealing plane that rotates duct on the corresponding stationary bushing of lining, the gateway of rotating duct on the lining is positioned at the circular groove bottom.

The utility model adopts clearance seal in swivel joint motive sealing place, and introduce the static pressure feedback control strategies first and control seal clearance, seal clearance is remained unchanged having under the situation of external interference, remain liquid friction between fixed block and revolving part, reduce friction and wear, prolonged the working life of swivel joint.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the concrete structure figure of hub sections in the utility model;

Fig. 3 is the schematic representation that the static pressure feedback control is calculated in the utility model.

Embodiment

High-speed joint structure of the present utility model as shown in Figure 1, the two ends of the rotatingshaft 2 of high-speed joint are by rolling bearing 3 supporting, two oil inlet and outlets 5 are arranged at housing 1 top, the bottom has three outer drain taps 13.Critical component of the present utility model is stationary bushing and rotation lining, and wherein stationary bushing is made up of two part 8a, 8b, and two parts are connected together by first group of screw 9, link to each other with housing through seal ring, maintain static; Rotate lining and be made up of two part 10a, 10b equally, two parts are connected together by second group of screw 11, link to each other with rotatingshaft 2 through seal ring, turn round with axle.

In the work, medium (as pressure oil) flows into from housing bore oil inlet and outlet 5, duct 6 on part 8a, 8b on the stationary bushing enters the circular groove 12 on the sealing plane, by rotating the runner 4 (Fig. 2) of the inflow rotatingshaft inside, duct on the lining part 10a, flow into oil hydraulic cylinder or miscellaneous parts by runner 4 at last again.The pressure endless belt that gap between stationary bushing and the rotation lining is 7,14 has formed the static pressure feedback control strategies, and the static pressure feedback control strategies is mainly come work by the static pressure that fluid produced, and makes fixed block and revolving part keep certain clearance.Revolving part can move along the axis trace, if because extraneous interference is moved revolving part, cause the gap to change, makes its gap recover original size by the static pressure feedback control.Therefore fixed block does not contact when working mutually with revolving part, only produces the liquid friction of viscosity.Static pressure feedback control embodiment is as follows in the high-speed joint,

The lining concrete structure can be derived the power F to the right that acts on the assembly 10a/10b according to fluid mechanics knowledge as shown in Figure 3 _c, act on power F left on the assembly 10a/10b.

Its formula is as follows:

$F_c=\frac{\mathrm{\&pi;}{p}_s}{8\ln R_0/r_0}[D_0^2-d_0^2(1+2\ln D_0/d_0)]+\mathrm{\&pi;}{p}_s({\mathrm{<figure-callout\; id="5"\; label="r"\; filenames="H2010200222733E00011.png"\; state="\{\{state\}\}">r</figure-callout>}}_5^2-{\mathrm{<figure-callout\; id="4"\; label="r"\; filenames="H2010200222733E00011.png"\; state="\{\{state\}\}">r</figure-callout>}}_4^2)---\left(1\right)$

Wherein, D ₀=2R ₀, d ₀=2r ₀

$p_s=\frac{\mathrm{<figure-callout\; id="1"\; label="p"\; filenames="H2010200222733E00011.png"\; state="\{\{state\}\}">p</figure-callout>}}{1+{\mathrm{Kh}}^3}---\left(2\right)$

P---charge oil pressure

K---structural coefficient

The gap at h---sealing strip 7 places

$F=\mathrm{p\&pi;}({\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="H2010200222733E00011.png"\; state="\{\{state\}\}">R</figure-callout>}}_2^2-{\mathrm{<figure-callout\; id="1"\; label="R"\; filenames="H2010200222733E00011.png"\; state="\{\{state\}\}">R</figure-callout>}}_1^2)+\frac{\mathrm{\&pi;p}}{8\mathrm{<figure-callout\; id="3"\; label="ln\; R"\; filenames="H2010200222733E00011.png"\; state="\{\{state\}\}">ln</figure-callout>}{R}_{}{}_3/R_2}[{\mathrm{<figure-callout\; id="3"\; label="D"\; filenames="H2010200222733E00011.png"\; state="\{\{state\}\}">D</figure-callout>}}_3^2-{\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="H2010200222733E00011.png"\; state="\{\{state\}\}">D</figure-callout>}}_2^2(1+2\mathrm{<figure-callout\; id="3"\; label="ln\; D"\; filenames="H2010200222733E00011.png"\; state="\{\{state\}\}">ln</figure-callout>}{D}_{}{}_3/D_2)]$

$+\frac{\mathrm{p\&pi;}}{4}({\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="H2010200222733E00011.png"\; state="\{\{state\}\}">D</figure-callout>}}_1^2-{\mathrm{<figure-callout\; id="1"\; label="d"\; filenames="H2010200222733E00011.png"\; state="\{\{state\}\}">d</figure-callout>}}_1^2)+\frac{\mathrm{\&pi;}(p-p_s)}{8\ln R_1/r_1}[{\mathrm{<figure-callout\; id="1"\; label="d"\; filenames="H2010200222733E00011.png"\; state="\{\{state\}\}">d</figure-callout>}}_1^2(1+2\ln \frac{D_1}{d_1})-D_1^2]---\left(3\right)$

Wherein, D ₃=2R ₃, D ₂=2R ₂, D ₁=2R ₁, d ₁=2r ₁

When no additional external force acts on the 10a/10b, F=F _C, h remains on former designed size.

When because ectocine, there is additional external force F ' left to act on the 10a/10b, then gap h reduces, by representation (2) p as can be known _sIncrease, by representation (1) (3) F as can be known _CIncrease, F reduces until F _c=F+F ', gap h returns to original size again.

Additional external force F ' as to the right acts on the 10a/10b, and then gap h increases, by representation (2) p as can be known _sReduce, by representation (1) (3) as can be known, F _CReduce, F increases until F _c=F-F ', gap h returns to original size again.

The utility model provides a kind of thinking and implementation methods of static pressure feedback control type high-speed joint; concrete application approach is a lot; the above only is a preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle, can also make some improvement, these improvement also should be considered as protection domain of the present utility model.

Claims (3)

1. static pressure feedback control type high-speed joint, it comprises housing (1), rotatingshaft (2), rolling bearing (3), described rotatingshaft (2) is bearing in housing (1) inside by rolling bearing (3), one end of rotatingshaft (2) extends housing and links to each other with other rotating equipment, rotatingshaft (2) inside has runner (4), runner (4) one ends extend housing with rotatingshaft and communicate with other rotating equipment, housing (1) is provided with some oil inlet and outlets (5), it is characterized in that: it also is provided with stationary bushing and rotates lining, described stationary bushing links to each other with housing (1) and maintains static, and the rotation lining links to each other with rotatingshaft (2) and turns round with axle; Stationary bushing and rotate lining in the middle of be provided with the duct (6) that communicates, and the duct of stationary bushing links to each other with oil inlet and outlet (5), and the duct of rotation lining links to each other with runner (4); Has axial static pressure feedback gap (7,14) between stationary bushing and the rotation lining.

2. static pressure feedback control type high-speed joint according to claim 1, it is characterized in that: described stationary bushing and rotation lining are made up of two parts respectively, wherein two of stationary bushing parts (8a, 8b) are connected together by first group of screw (9), link to each other with housing (1) through seal ring; Two parts (10a, 10b) that rotate lining are connected together by second group of screw (11), link to each other with rotatingshaft (2) through seal ring.

3. static pressure feedback control type high-speed joint according to claim 2 is characterized in that: be provided with circular groove (12) on the sealing plane that rotates duct on the corresponding stationary bushing of lining, the gateway of rotating duct (6) on the lining is positioned at the circular groove bottom.

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