CN209905033U - Rotary vane type steering engine with high sealing performance - Google Patents

Abstract

The utility model discloses a high leakproofness's commentaries on classics leaf formula steering wheel, use in commentaries on classics leaf formula steering wheel field, solved the steering wheel and lead to radial bulky and not light and handy technical problem inadequately because of sealed, its technical scheme main points are including cylinder body, rotate the rotor of connection in the cylinder body, the upper and lower both ends of cylinder body all are equipped with the end cover, be equipped with quiet leaf on the cylinder body, the both sides of quiet leaf all are equipped with oil inlet chamber and oil outlet chamber, all be equipped with on the quiet leaf with oil inlet chamber and the oil inlet and the oil-out that communicate in the oil outlet chamber, all be equipped with the sealing washer between end cover and the rotor, be equipped with the oil filler point that communicates with the sealing washer back on the end cover along the radial direction of end cover, be equipped with the connecting pipe on oil inlet and the oil outlet on one; the steering engine has the technical effects that the oil inlet is communicated with the oil filling hole, so that two hydraulic devices are reduced, and the effect of reducing the volume of the steering engine is further achieved.

Description

Rotary vane type steering engine with high sealing performance

Technical Field

The utility model relates to a commentaries on classics leaf formula steering wheel field, more specifically says, it relates to a commentaries on classics leaf formula steering wheel of high leakproofness.

Background

The principle of the rotary vane type steering engine is that high-pressure and low-pressure oil directly acts on a rotor to rotate, the volume is small, the efficiency is high, and the relative cost is high. When the steering engine works, the rotating vane type steering engine is connected with a hydraulic station, and the hydraulic station is used for injecting oil into the steering engine and absorbing oil, so that high-pressure oil and low-pressure oil are generated.

At present, chinese patent with publication number CN204399460U discloses a sealed rotary vane type hydraulic steering engine, which comprises a cylindrical cylinder body, a stationary vane, a rotor with a movable vane, a cylinder cover, and further a cylinder fin, an upper cover fin and a lower cover fin, wherein the cylinder cover comprises an upper cylinder cover and a lower cylinder cover, the cylinder body and the stationary vane are provided with a first axial sealing strip, the rotor and the movable vane are provided with a second axial sealing strip, the upper cylinder cover and the lower cylinder cover are respectively provided with a first sealing ring and a second sealing ring, and the second axial sealing strip comprises a main sealing surface, an auxiliary sealing surface, a V-shaped groove and a sealing strip body.

This kind of canned type commentaries on classics leaf formula hydraulic steering wheel carries out the oiling through independent sealed oil circuit to the sealing washer, but can increase extra oil feeding system like this, increases the radial diameter of steering wheel simultaneously to make the steering wheel big, simultaneously in order to prevent the oil backward flow of independent sealed oil circuit, and then can set up the check valve in independent sealed oil circuit, further lead to the wall thickness of cylinder body to increase, make the steering wheel heavy.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a commentaries on classics leaf formula steering wheel of high leakproofness, its advantage is, when guaranteeing the leakproofness of steering wheel, reduces the equipment of connecting on the steering wheel, and then makes the steering wheel lighter and more handy.

The above technical purpose of the present invention can be achieved by the following technical solutions: a rotary vane type steering engine with high sealing performance, which comprises a cylinder body and a rotor rotationally connected in the cylinder body, the upper end and the lower end of the cylinder body are respectively provided with an end cover, the inner wall of the cylinder body is provided with two stationary blades, the outer wall of the rotor is provided with two movable blades, an oil inlet cavity and an oil outlet cavity are respectively arranged at two sides of the movable blade, an oil inlet and an oil outlet communicated with the oil inlet cavity and the oil outlet cavity are respectively arranged on the stationary blade, an annular sealing ring is arranged between the end cover and the rotor, an annular concave part is arranged at one end of the sealing ring close to the end cover, an oil filling hole communicated with the concave part is arranged on the end cover along the radial direction of the end cover, the oil inlet and the oil outlet on one of the stationary blades are respectively provided with a connecting pipe communicated with the oil filling hole, and a one-way valve for preventing the backflow of the hydraulic oil is arranged on the connecting pipe or in the oil injection hole.

Through the technical scheme, the oil inlet, connect the hydraulic pressure station on the oil-out, a to the oil feed in the oil feed chamber, it has to withdraw simultaneously in the oil cavity, hydraulic pressure station is through the oiling in the connecting pipe to the oil filler point when to the oil feed in the oil feed chamber, because the kinetic friction of rotor is less than the biggest static friction of rotor, thereby make the oil pressure of the oil in the oil filler point can be greater than the oil pressure in the oil feed chamber, because the check valve sets up, make oil in the oil filler point can not flow back, make the oil pressure in the oil filler point remain the oil pressure that is higher in the oil feed chamber all the time, thereby make high pressure oil compress tightly the sealing washer all the time, prevent the oil reflux in oil feed chamber or the oil outlet. Simultaneously, an additional independent oil supply system is not needed, so that the steering engine is smaller and more convenient, and meanwhile, the one-way valve is connected to the opening position of the oil filling hole and is limited by the diameter of the end cover. When the rotor counter-rotation, the position conversion of oil inlet chamber and the oil outlet chamber this moment, the setting of two connecting pipes for no matter rotor forward rotation or reverse rotation, can both improve the leakproofness of sealing washer through the connecting pipe oiling in to the oil filler point.

The utility model discloses further set up to: and an oil pipe is arranged between the upper oil injection hole and the lower oil injection hole and is communicated with the oil injection hole.

Through above-mentioned technical scheme, oil pipe is used for the oil filler point on two end covers about the intercommunication to make the in-process of oil feed, can further reduce the pipeline of connecting on the steering wheel to two oil filler points oil feed simultaneously, thereby reduce the whole volume of steering wheel.

The utility model discloses further set up to: follow on the quiet leaf the axial direction of cylinder body inlays and is equipped with first sealing strip, the outer wall of rotor with first sealing strip interference fit.

Through above-mentioned technical scheme, first sealing strip prevents that oil in the oil inlet chamber from permeating to the oil outlet chamber along the gap between rotor and the quiet leaf in the pivoted in-process of rotor.

The utility model discloses further set up to: the movable vane is close to one side edge of cylinder body inner wall follow the axial direction of cylinder body inlays and is equipped with the second sealing strip, the cylinder body with second sealing strip interference fit.

Through above-mentioned technical scheme, the second sealing strip prevents that oil in the oil inlet chamber from permeating to the chamber of producing oil along the gap between cylinder body inner wall and the movable vane at the pivoted in-process of rotor.

The utility model discloses further set up to: the rotor is provided with a stop block, the side wall of the cylinder body is provided with two travel switches, the travel switches are located on two sides of the stop block, and the radian between the travel switches is smaller than or equal to the maximum rotation angle of the movable blade.

Through above-mentioned technical scheme, the stroke of rotor receives the restriction of quiet leaf, and when movable blade and quiet leaf were inconsistent, when the oil inlet chamber was gone into oil again this moment, lead to receiving the extrusion between movable blade and the quiet leaf, cause the damage of movable blade or quiet leaf. The travel switch prevents the movable blade from colliding with the stationary blade, and the rotor and the cylinder body are well protected.

The utility model discloses further set up to: all the oil inlets and the oil outlets are provided with high-pressure ball valves.

Through above-mentioned technical scheme, high-pressure ball valve and hydraulic pressure station's tube coupling, the open mode usually, when a hydraulic pressure station pipeline or valve member leak the trouble, close this ball valve, can keep apart the hydraulic pressure station of trouble to can not influence the work of another pump station.

The utility model discloses further set up to: one end of the rotor is provided with a pointer, and the cylinder body is provided with a dial.

Through above-mentioned technical scheme, the calibrated scale is convenient for accurately know rotor pivoted angle and position.

The utility model discloses further set up to: and a thrust bearing is arranged between the lower surface of the rotor and the end cover.

Through above-mentioned technical scheme, the setting of bearing reduces the frictional force between the end cover of rotor and rotor lower extreme, further reduces the wearing and tearing between rotor and the end cover, makes rotor pivoted more smooth and easy simultaneously.

To sum up, the utility model discloses following beneficial effect has:

1. the oil filling port is communicated with the oil inlet, so that an additional oil supply system is not needed, and other parts such as a pipeline connected to the steering engine are further reduced;

2. the travel switch protects the rotor so that the movable blade does not collide with the stationary blade.

Drawings

Fig. 1 is an overall configuration diagram of the present embodiment.

Fig. 2 is a schematic structural view of the rotor and the cylinder of the present embodiment.

Fig. 3 is a cross-sectional view a-a of fig. 1.

Fig. 4 is a cross-sectional view of T-T in fig. 3.

Fig. 5 is an enlarged view at D in fig. 4.

Fig. 6 is a sectional view of B-B in fig. 4.

Fig. 7 is a plan view of the present embodiment.

FIG. 8 is a schematic view showing the structure of the connecting pipe and the oil filler hole of the embodiment.

Fig. 9 is a schematic structural view of the screw nail of the present embodiment.

Reference numerals: 1. a cylinder body; 11. a stationary blade; 12. an oil inlet; 13. an oil outlet; 14. a high pressure ball valve; 15. a first seal strip; 16. a travel switch; 17. a stopper; 18. a pointer; 19. a dial scale; 2. a rotor; 21. moving blades; 22. an oil inlet cavity; 23. an oil outlet cavity; 24. a second seal strip; 3. an end cap; 31. a seal ring; 32. a recessed portion; 33. a thrust bearing; 34. a through hole; 4. an oil filler hole; 41. a connecting pipe; 42. a one-way valve; 43. a threaded nail; 44. and (4) an oil pipe.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b): referring to fig. 1 and 2, a high-sealing rotary vane steering engine includes a cylinder body 1, and a rotor 2 rotatably connected in the cylinder body 1, wherein two stationary vanes 11 are fixed on an inner wall of the cylinder body 1, the two stationary vanes 11 are arranged along a diameter direction of the cylinder body 1, two movable vanes 21 are arranged on an outer wall of the rotor 2, the two movable vanes 21 are arranged along a diameter direction of the rotor 2, an outer side wall of each movable vane 21 contacts with an inner side wall of the cylinder body 1, and the stationary vanes 11 contact with an outer side wall of the rotor 2. An oil inlet cavity 22 and an oil outlet cavity 23 are respectively arranged on two sides of the rotor 2, an oil inlet 12 and an oil outlet 13 are arranged on the stationary blade 11, the oil inlet 12 is communicated with the oil inlet cavity 22, and the oil outlet 13 is communicated with the oil outlet cavity 23. When oil is fed into the oil inlet cavity 22 and discharged from the oil outlet cavity 23, the high-pressure oil pushes the rotor 2 to rotate, so that the function of rotating the rotor 2 is realized.

Referring to fig. 1 and 2, the oil inlet 12 is L-shaped, a vertical end of the oil inlet 12 is disposed along an axial direction of the cylinder block 1, and the oil inlet 12 and the oil outlet 13 are identical in shape. The high-pressure ball valves 14 are arranged on the oil outlet 13 and the oil inlet 12, the high-pressure ball valves 14 are connected with pipelines of the hydraulic stations, the pipelines or valve parts of one hydraulic station are normally in an open state, when leakage faults occur on the pipelines or valve parts of one hydraulic station, the high-pressure ball valves 14 are closed, the faulty hydraulic station can be isolated, and therefore the work of the other hydraulic station cannot be influenced.

Referring to fig. 4 and 5, end caps 3 are provided at both ends of the cylinder block 1, a seal ring 31 is provided between the end caps 3 and the side surface of the rotor 2, a recess 32 is provided on the seal ring 31 at a side close to the end caps 3, and a vertical end of the oil inlet 12 passes through the end caps 3.

Referring to fig. 5 and 7, an oil filler hole 4 is provided in the end cover 3 in the radial direction of the end cover 3, the oil filler hole 4 communicates with the recess 32, a check valve 42 is provided at a port of the oil filler hole 4, and two connection pipes 41 are provided in the horizontal direction on the check valve 42.

Referring to fig. 7 and 8, two through holes 34 are provided in the end cover 3 in the radial direction of the end cover 3, both ends of one through hole 34 are respectively connected to the oil inlet 12 and the connecting pipe 41, and both ends of the other through hole 34 are connected to the oil outlet 13 and the other connecting pipe 41.

Referring to fig. 2 and 7, when the oil enters the oil inlet cavity 22 from the hydraulic station, the oil is injected into the oil injection hole 4 (refer to fig. 5) through the connecting pipe 41, because the dynamic friction of the rotor 2 is smaller than the maximum static friction of the rotor 2, the oil pressure of the oil in the oil injection hole 4 is larger than the oil pressure in the oil inlet cavity 22, and because of the setting of the check valve 42, the oil in the oil injection hole 4 cannot flow back, the oil pressure in the oil injection hole 4 is always kept higher than the oil pressure in the oil inlet cavity 22, so that the high-pressure oil always presses the sealing ring 31, and the oil in the oil inlet cavity 22 or the oil outlet cavity 23 is prevented from flowing back or leaking.

Referring to fig. 2 and 7, when the rotor 2 rotates in the reverse direction, the positions of the oil inlet chamber 22 and the oil outlet chamber 23 are reversed, and the two connecting pipes 41 are arranged so that oil can be injected into the oil injection hole 4 (refer to fig. 4) through the connecting pipes 41 regardless of whether the rotor 2 rotates in the forward direction or in the reverse direction, thereby improving the sealing performance of the sealing ring 31.

Referring to fig. 8 and 9, a screw 43 is provided on the check valve 42, and the screw 43 passes through the check valve 42 and is screwed in the oil hole 4 (refer to fig. 4). A T-shaped oil passage is provided inside the screw so that oil can enter the oil filler hole 4 through the oil passage, and an oil pipe 44 is provided in the vertical direction on the check valve 42, the oil pipe 44 being used to communicate the oil filler holes 4 on the upper and lower end caps 3.

Referring to fig. 3, a first sealing strip 15 is embedded in the stationary blade 11 along the axial direction of the cylinder 1, the outer wall of the rotor 2 is in interference fit with the first sealing strip 15, and the first sealing strip 15 prevents oil in the oil inlet cavity 22 from permeating into the oil outlet cavity 23 along a gap between the rotor 2 and the stationary blade 11 in the rotating process of the rotor 2; a second sealing strip 24 is embedded in one side, close to the inner wall of the cylinder body 1, of the movable vane 21 along the axial direction of the cylinder body 1, the inner wall of the cylinder body 1 is in interference fit with the second sealing strip 24, and the second sealing strip 24 prevents oil in the oil inlet cavity 22 from permeating into the oil outlet cavity 23 along a gap between the inner wall of the cylinder body 1 and the movable vane 21 in the rotating process of the rotor 2.

Referring to fig. 1 and 7, two stroke switches 16 are provided on the outside of the cylinder 1, a stopper 17 is provided between the two stroke switches 16, the stopper 17 is L-shaped, and one end of the stopper 17 is fixed to the rotor 2. The rotor 2 rotates, the stop block 17 and the rotor 2 rotate synchronously, when the stop block 17 touches the travel switch 16, the travel switch 16 controls the hydraulic station to stop feeding oil, the rotor 2 stops rotating at the moment, and the radian between the travel switches 16 is smaller than or equal to the maximum rotation angle of the movable vane 21. The movable blades 21 are prevented from colliding against the stationary blades 11, and the rotor 2 and the cylinder 1 are well protected. The dial 19 is arranged on the cylinder 1, the pointer 18 is arranged on the rotor 2, and the dial 19 and the pointer 18 are matched, so that the rotating angle and the rotating position of the rotor 2 can be accurately known.

Referring to fig. 4, a thrust bearing 33 is disposed between the lower surface of the rotor 2 and the end cover 3, and the rotor 2 is collided with the end cover 3 by gravity due to the separation of gravity, and the thrust bearing 33 is disposed to reduce the abrasion between the rotor 2 and the end cover 3 and to make the rotation of the rotor 2 smoother.

The action process is as follows: oil enters the oil inlet cavity 22 from the oil inlet 12 and is discharged from the oil outlet cavity 23 through the oil outlet 13, so that the rotor 2 rotates; and the oil way is changed reversely, so that the rotor 2 is turned over. The oil is injected into the oil injection hole 4 through the connection pipe 41 while being fed, so that the sealing performance with respect to the seal ring 31 is improved.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims (8)

1. A high-sealing rotary vane type steering engine comprises a cylinder body (1) and a rotor (2) rotatably connected in the cylinder body (1), wherein end covers (3) are arranged at the upper end and the lower end of the cylinder body (1), two stationary vanes (11) are arranged on the inner wall of the cylinder body (1), two movable vanes (21) are arranged on the outer wall of the rotor (2), an oil inlet cavity (22) and an oil outlet cavity (23) are arranged on two sides of each movable vane (21), the high-sealing rotary vane type steering engine is characterized in that an oil inlet (12) and an oil outlet (13) communicated with the oil inlet cavity (22) and the oil outlet cavity (23) are arranged on each stationary vane (11), an annular sealing ring (31) is arranged between each end cover (3) and the rotor (2), an annular concave part (32) is arranged at one end, close to the end cover (3), of each end cover (3) is provided with an oil filling hole (4) communicated with the concave part (32) along the radial direction of the end cover (3), and a connecting pipe (41) is arranged on the oil inlet (12) and the oil outlet (13) of one of the stationary blades (11) and communicated with the oil filling hole (4), and a check valve (42) for preventing hydraulic oil from flowing back is arranged on the connecting pipe (41) or in the oil filling hole (4).

2. The high-sealing rotary vane type steering engine according to claim 1, wherein an oil pipe (44) is arranged between the upper and lower oil injection holes (4), and the oil pipe (44) is communicated with the oil injection holes (4).

3. The high-sealing rotary vane type steering engine according to claim 1, wherein a first sealing strip (15) is embedded in the stationary vane (11) along the axial direction of the cylinder body (1), and the outer wall of the rotor (2) is in interference fit with the first sealing strip (15).

4. The high-sealing rotary vane type steering engine according to claim 3, wherein a second sealing strip (24) is embedded on one side of the movable vane (21) close to the inner wall of the cylinder body (1) along the axial direction of the cylinder body (1), and the cylinder body (1) and the second sealing strip (24) are in interference fit.

5. The high-sealing rotary vane type steering engine according to claim 1, wherein a stop block (17) is arranged on the rotor (2), two travel switches (16) are arranged on the side wall of the cylinder body (1), the travel switches (16) are located on two sides of the stop block (17), and the radian between the travel switches (16) is smaller than or equal to the maximum rotation angle of the movable vane (21).

6. The high-sealing rotary vane type steering engine according to claim 2, wherein all the oil inlets (12) and the oil outlets (13) are provided with high-pressure ball valves (14).

7. The rotary vane type steering engine with high sealing performance according to claim 1, wherein one end of the rotor (2) is provided with a pointer (18), and the cylinder body (1) is provided with a dial (19).

8. The high-sealing rotary vane type steering engine according to claim 7, wherein a thrust bearing (33) is arranged between the lower surface of the rotor (2) and the end cover (3).

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