JPH01131384A - Rotary shear seal hydraulic valve - Google Patents

Abstract

PURPOSE: To make the replacement and repair of a valve assembly easier and to reduce the kinds and stock of parts by reducing the number of the parts in a rotary shear seal hydraulic valve. CONSTITUTION: Shear seal assemblies 32 are disposed in several bores 34 formed in a valve housing of a rotary shear seal hydraulic valve. Each shear seal assembly 32 comprises an annular seal body 42 mounted in bore 34 and a spring 54 for biasing the seal body 42 into engagement with the axial face of a molding rotor. The annular seal body 42 performs wiping with the wall of the bore 34.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a new rotary chassis seal hydraulic valve, and more particularly to a valve that can be manufactured as various valves. (The rotary shear seal refers to a means for relatively slidably sealing the holes opened in the opposing surfaces of both relatively rotatable members.) The present invention relates to various types of rotary shear valve devices. It is an improvement,
The purpose is to reduce the number of parts used to form various valves.

The valve of the invention is formed from only four basic parts, each of which includes only a few variations. A large number of three-way or four-way valves can be manufactured with this relatively small number of component types. One-part inventory and valve assembly are thus significantly simplified. This is a significant advantage in the field where the variety and number of parts in stock are limited and valve assemblies must be rapidly replaced or repaired.

The valve of the present invention is primarily used for four-pilot (four different pilots) control to obtain at least five different shift pressures in a three-way or four-way flow pattern. The valve of the present invention can be manually actuated with hydraulic or pneumatic overrides for either three-way or four-way flow patterns. The valve of the present invention can be combined with a solenoid viroft valve or configured as a hydraulically pilot operated spring return valve. The valve of the present invention can be advantageously combined, for example, with the device described in US Pat. No. 4,467,833.

This type of conventional three-way four-way valve is linearly actuated.

The present invention is a rotary chassis seal hydraulic valve with numerous advantages:
For example, it has the advantage of allowing high return pressure.

SUMMARY OF THE INVENTION The present invention is a rotary chassis seal hydraulic valve having a valve housing and a valve body that together define a generally cylindrical cavity of useful cross section. The valve body includes at least one passageway within the valve body communicating along the chord of the cavity and a port opening at each end of each passageway. at least two holes in the valve housing communicating with the cavity parallel to the axis of the cavity and having at least one hole on a curve concentric with the axis. A shaped rotor is engaged within the cavity, the rotor having an axial surface containing at least two (hard) ports, and conduits within the rotor connecting the ports in pairs. The rotor is molded to include a portion forming a pinion. A piston is engaged in each of the at least one passage, each piston defining a rack that engages the pinion portion of the rotor. As a result, when the piston reciprocates, the rotor is rotationally driven.The shear seal assembly is located in each hole in the housing, and the shear seal assembly is an annular seal body installed in each hole. and a spring for biasing the seal body into engagement with the axial surface of the rotor.The annular seal provides a sliding seal between the seal body and the wall of the bore.

1JIU Embodiments and drawings illustrating the present invention will be described.

1A-10 shows an embodiment of a four-way rotary chassis seal hydraulic valve according to the invention, including details common to all other embodiments. Portions not described in detail in other embodiments are the same as the description of this embodiment. This four-way valve embodiment is preferred and has three-way valve functionality when the ports are selectively closed.

Four-way rotary chassis seal hydraulic valve lO shown in Figure 1A-10
is the valve body 12. Housing 14. A space between the housing 14 and the body 12 is formed by the rotor 16 housed within the space. Housing 14 is a generally rectangular member having a forward facing mounting surface 20 and a rearward facing engagement surface 22. An annular recess 24 is formed in the surface 22, and an annular circumferential flange 2 is formed.
Surrounded by 6. The recess 24 and the flange 26 form a portion 18a of the cavity 18, which portion has a large first diameter. Flange 26 facing outward? 0 ring 30 inside a28
engage.

The housing 10 further includes at least two shear seal assemblies 32 extending between the husband surface 20 and the base of the recess 24. The holes forming each chassis seal assembly are first
The first hole 34 has a large diameter and the second
It has a second hole 36 with a small diameter. An O-ring 38 is engaged within an annular groove 40 concentric with the hole 36. 1st C
The illustrated chassis seal body 42 is an annular member having an outwardly facing groove 44 for engaging an O-ring 46 and a backup ring 48 . The main body 42 has a wrapping surface 50 and a hole 52 that is open on one surface 50 and passes through the interior of the main body 42 .

In a preferred example, the hole 52 has a truncated conical entrance to the surface 50. The spring 54 engages within the first aperture 34 between a shoulder 58 formed between the rear surface 56 of the seal body 42 and the first and second apertures 34-36. The fluid pressure acting on the spring 54 and the rear surface 56 causes the seal body 42 to be pushed outward of the hole 34 by a piston action.

The main body I2 is also a nearly rectangular member, and its outer shape is similar to that of the housing 1.
0, the engagement surface 60 has a first portion 62 opening directly into the surface and having a first diameter, a second continuous portion 64 having a second smaller diameter, and a shoulder 66 in between. Form. 1st
portion 62 accommodates flange 26 of body 12. Portion 64 and shoulder 66 form the rear portion of cavity 18 . In this embodiment, a pair of holes 68, 70 extend perpendicularly on either side of the axis of section 64, one intersecting the chord of section 64. Number hole 68,
70 is a blind hole closed at one end with plugs 72, 74, and a seal between the plug and the body is formed by O-rings 76, 78. Ports 80 shown in FIG. 1D are provided at both ends of the hole.
It has 82,84.86. Piston 88.9 in each hole
0 and the center of each piston has a rack gear 92.94
forming one opposite piston head 96.98.10
It has 0.102. O-rings 112, 114, 116. in the outward grooves of each piston head. Engage the us and bank up rings 120.122.124.126. The reason for using piston heads of different sizes is to operate the valves by pressure differentials. For example, set the reference pressure to port 8
4 to act on the smallest piston head 100. This keeps the valve in a steady position and when pressure is introduced into one of the ports 80, 86, the large piston head area causes the rotor to rotate to the other position against the action of the reference pressure. This movement can be caused by a combination of forces acting on each piston head. The piston is at the opposite end of the hole because the rack moves in the opposite direction to rotate the rotor.

The rotor 16 is a solid, generally cylindrical member having a first large diameter first portion striking front 128 . Front part 1
At least two ports 132.1 on the front side 130 of 28
34, and the ports are internally connected in pairs by passages 136. A rear portion 138 integrally coaxial with the front portion 128 is a second portion.
diameter, and a shoulder 140 is formed in the middle. A thrust race 142 is engaged with the shoulder 66 of the body 12 and a plurality of thrust needle bearings 144 are engaged between the thrust race 142 and the shoulder 140. This bearing arrangement supports the rotor against the thrust loads of the sheath seal 41 and the internal pressure on the face 56.

A pinion gear 146 is attached to the outer surface of the second portion 138 in the first D.
It is formed as shown and engages the rack gear portion 92.94 of the piston 88.90.

Head screws 146, 148, 150 secure the body and housing as shown in Figure 1H. Headless 152.15
4°1.56,158 is used to attach a valve to the equipment to be controlled, shown in chain lines in FIG. 1A, or to attach a cover plate (not shown) for transportation.

As shown in Figures 1E, IP, and IG, the rotor 16 has two pairs of ports 132 and 134, each of which is communicated by a conduit 136. The housing has a pressure cap [60, return port 162. First cylinder port 164. The second cylinder port 166 has an O ring for each port 168.170.172.17
4 to form an airtight seal within the device (not shown).

A first port 176 and a second port 178 in the housing.
A third port tso, a fourth port 182 are formed and surrounded by O-rings 184, 186, 188, and 190, respectively. Housing port 176.178.180.182
corresponds to ports 80°82.84.86 on the valve body.

This port 180 is shown in FIG. 1G and corresponds to port 84 in body 12. An O-ring 192 is inserted between the surface 22 of the housing 10 and the surface 60 of the main body 12 to maintain a seal.

A first preferred embodiment of the invention may be used as a four-way valve as shown in FIG. 1B, with control provided by selective pressurization of ports 76, 178, 180, and 182. The steady state process pressurizes the reference port 182 and evacuates or pressurizes at least one port 178, 180 to cause relative counter-parallel movement of the piston 88, 90 by pressure differential and selectively pressurizes the port 132, 134. 160. return 162, first cylinder 164. It is made to face each port of the second cylinder 166.

A second embodiment of the invention is shown in Figures 2^-2C and is similarly a four-way valve but with one piston 90''.

Since the second embodiment is structurally similar to the first embodiment,
Components corresponding to those in the first embodiment are indicated by the same reference numerals with a prime added.

As shown in FIG. 2B, when pressure is applied to the signal port 3 or the reference port 4, the valve rotates to the required position, resulting in four-way control. This embodiment can be assembled as a body with a single bore 70' and piston 94', ie, with piston 88 and plug ports 80, 82 removed.

A third embodiment of the invention is shown in Figures 3A-3E. In this embodiment, the valve assembly is a three-way valve, rather than the four-way valve of embodiment 1.2. This embodiment differs from the first embodiment in the location and number of ports in the rotor and in the housing. Therefore, only the parts that are different from the previous embodiment will be described, and the other parts are almost the same as the previous embodiment. In this example, the rotor 194 has a port 196 concentric with the axis of rotation;
a second port 19 radially outward from the central port 196;
8.

Both ports are interconnected by an internal passageway 200.

The housing 14 repositions the ports and the rotor 19
4 and a central port 202 concentric to the axis of rotation of rotor 1.
94 and ports 204, 206 located along a circumference corresponding to the distance to the outer port 198 of 94.

This embodiment has two pistons driving the rotor as before.

The fourth and fifth embodiments of the present invention are shown in FIGS. 4A-4C and 5A-4C.
5C, it is a three-way rotary chassis seal hydraulic valve similar to the third embodiment. The embodiment shown in Figures 4A-4C is a normally open valve, and the embodiment shown in Figures 5A-5C is a normally closed valve. The rotors 194'' and 194'' of this embodiment are similar to the rotor 194 of the third embodiment. The piston arrangement is similar to either of the third embodiments, with the pistons being normally open in FIG. The normally closed valve in Fig. 5 is driven to close and the normally closed valve in Fig. 5 is driven to open.In the third embodiment, the ports 3.4 are internally closed and are not used, but in the fifth embodiment, the ports 1.4 and 1.4 are closed. 2
Do not use with the port internally blocked. Operation diagram No. 4B,
This is clear from Figure 5E.

The sixth and seventh embodiments are shown in FIGS. 6A-6C, 1, and 7A-7C. This embodiment differs from the previous embodiment 3.4.5 in the piston drive section. In the sixth embodiment.

Piston bore 208 is closed at one end by a threaded plug 210 to allow piston 212 to slide therein. The piston 212 has a piston tip 214 at one end, an intermediate rack gear portion 216, a molded end 218, and includes a flange 220 forming a shoulder 222 that engages a spring 224. The other end of the spring engages the plug 210. □ In this embodiment, 1 and 2.4 are omitted or are internally closed, and are unnecessary. The valve has a normally closed return spring as shown diagrammatically in Figure 6B. To operate the valve, pressure is applied to the piston shaft 214, driving the piston to rotate the rotor clockwise from the position shown in FIG. 6C to the position shown in FIG. 7C.

FIG. 7 shows a variation of FIG. 6 in which the piston is on the opposite side of the body and rotates the rotor counterclockwise. In this embodiment, the parts are mirror symmetrical to the embodiment in FIG. 6 and are shown with the same reference numerals and a prime. As shown in Figure 7B, in this embodiment boat 1.3.4 is either closed or omitted and is not used.

The embodiment shown in FIG. 8 is another four-way rotary shear hydraulic valve and is similar to the embodiment of FIG. This embodiment has a manual override as shown in FIG. 8B, and unlike the previous four-way valve, only this portion will be described. In this example,
The rotor 226 has an extension 228 and projects from the f&2 opening 230 of one body 12'. An outwardly directed groove 232 is formed in the extension 228 to engage an O-ring 234 to seal the opening 230.

Lever 236 is attached to the free end of extension 228 by bolt 238. In a preferred example, the extension 228 is slightly deformed to allow non-rotational engagement between the lever and the rotor. A rearward facing hole 240 is formed at 12 degrees of the body and a spring-loaded stop member 242 is locked in the hole by a clip 244. A hole 248 is formed in the lever 236 and the stopper member 242
engage the tips of the Stop member 242 engages hole 248 when handle 236 is in the central position.

The operation of this embodiment involves rotating the lever to the desired position to position the rotor and interconnect the ports. The stop member engages with the lever to lock the lever and prevent rotation of the rotor. Although only one stop member is shown, any number of stop members may be provided to provide the desired control.

The embodiment shown in Figures 9A-9B is a four-way rotary shear hydraulic valve in which piston operation is controlled by a solenoid biloft valve. In this embodiment, the housing 10 and rotor 16 are similar to the other embodiments. The main body 250 differs in the following points. A pair of solenoids 252, 254 are mounted on the body, with respective valve assemblies 256, 258 located in holes 260.2.
62. Internal conduits 264, 268 interconnect the holes, and a port 270 connected to conduit 268 is connected to a port 272 in the housing. It communicates with pressure port 160 via conduit 274 . The matching holes 260 and 262 are stepped, with a large diameter first part 276, an intermediate part 2781, and a neck part 2.
It has 80. The first largest valve portion of the valve assemblies 256, 258 includes an O-ring 286 between first and second spaced apart flanges 282, 284. The second intermediate valve includes an O-ring 292 between the first and second flanges 288,290. Third
The smallest valve portion of includes a pair of spaced apart flanges 294, 296 and an O-ring 198 therebetween. In FIG. 9C, hole 30
0.302 connect holes 260, 262, respectively, to opposite ends of hole 68 that engage piston 88.

The operation of this embodiment is shown in FIG. 9B. solenoid 252
．． Energizing 254 opens each valve assembly, connecting pressure port 160 to one end of bore 68 and driving piston 88 to rotate the rotor in the open or close direction.

As mentioned above, with a small number of standard parts, the present invention can assemble various three-way four-way rotary chassis seal hydraulic valves.

This makes repairs easy.

The number of parts to be stocked is small.

The present invention is capable of various modifications in size, shape, material, and structural details, and the embodiments and drawings are illustrative and do not limit the invention.

[Brief explanation of the drawing]

FIG. 1A is a sectional view taken along line IA-IA in FIG. 1D of a four-pilot four-way rotary chassis seal hydraulic valve according to the present invention, FIG. 1B is a line diagram of the valve in FIG. 1A, and FIG. 1C is a diagram of FIG. 1A. 1D is an enlarged detailed view of the chassis seal of FIG. 1A.
A cross-sectional view along line 10, Figure 1E is IE of Figure 1A! -I
Il! A cross-sectional view along the line, Figure 1F is IP-I in Figure 18.
Front view along line P, Figure 1G is Figure 1F (7>IG-I
FIG. 1II is a sectional view taken along the line G, FIG. 1II is a sectional view taken along the 1T IN line in FIG. 1F, and FIG. 2A is the same as FIG. 10 of the second embodiment of the four-way rotary chassis seal hydraulic valve of the present invention. 2B is a line diagram of the embodiment of FIG. 2A, FIG. 2C is a sectional view similar to FIG. 1E of the second embodiment of the present invention, and FIG. 38 is a three-way diagram of the present invention. A sectional view similar to FIG. 18 showing the rotating chassis seal hydraulic valve, FIG. 3B is a line diagram of the embodiment shown in FIG. 3A, and FIG.
Figure C is a sectional view taken along line 3C-3C in Figure 38, Figure 3D is a sectional view taken along line 3O-3D in Figure 3A, and Figure 3E is a side view taken along line 3B-3E in Figure 38. Figure 4A is a sectional view similar to Figure 1D of the normally open three-way rotary chassis seal hydraulic valve of the present invention, Figure 4B is a line diagram of this fourth embodiment, and Figure 4C is a diagram of the fourth embodiment. FIG. 5A is a sectional view similar to FIG. 48 of the normally closed three-way rotary shear seal valve hydraulic valve of the present invention, and FIG. 5B is a sectional view of the fifth embodiment. line diagram,
FIG. 5C is a sectional view similar to FIG. 4C of the fifth embodiment, FIG. 6A is a sectional view similar to FIG. 1D of the normally closed spring return three-way rotary chassis seal hydraulic valve of the present invention, and FIG. 6B. is a line diagram of this sixth embodiment, FIG. 6C is a sectional view similar to FIG. 1E of the sixth embodiment, and FIG. 78 is a diagram of the normally open spring return rotating chassis seal hydraulic valve of the present invention. Sectional view similar to the figure, No. 78TI
IJ is a 6-line diagram of this seventh embodiment, Figure 7C is a sectional view similar to Figure 6C of the seventh embodiment, and Figure 8A is a manually overloaded four-way three-position rotary chassis seal hydraulic valve of the present invention. 8B is a line diagram of the eighth embodiment, FIG. 8C is a sectional view taken along line 88-88 of FIG. A sectional view of the chassis seal hydraulic valve, FIG. 9B is a diagram of this ninth embodiment, FIG.
Figure C is a cross-sectional view taken along line 9C-9C in Figure 9A, Figure 9D is a cross-sectional view taken along line 9O-9D in Figure 98, and Figure 9E is a cross-sectional view taken along line 9C-9C in Figure 9A. -Front view along the line 9E, Figure 9F is the 9th
It is a sectional view along line 9F-9F of figure C. 102. Four-way rotating chassis seal hydraulic valve 128. Valve body 141. Housing 16. , rotor 34.36.
,,hole 429. Shaseal body 80.82.84,
86. ,,port 88.90. ,, piston 96, 98.100.102. , , piston head 132, 134. ,,port 160. ,,pressure port +62. , , return bow) 164. ,,first cylinder port 166,,,second cylinder port 176,178,180,182. ,,housing port 194,,,rotor 196,202,204. ,
, port 208, , piston hole 212. , piston 226, , rotor 236. , lever 250.
, main bodies 252, 254. , , Solenoid 256,2
58. , Valve assembly patent applicant The Rucker Company Representative Patent attorney Masahiro Matsui (and one other person) L "Qa)cD. ψ 10 1NFIθ

Claims (1)

[Claims] 1. A rotary chassis seal hydraulic valve comprising: a valve housing and a valve body that together define a generally cylindrical cavity with a stepped cross section; and a valve body that communicates along the chord of the cavity. at least one passageway in the valve housing, a port opening at each end of each said passageway, and at least one hole on a curve parallel to the axis of the cavity and communicating with the cavity and concentric with the axis; a molded rotor engaged within the cavity, the rotor having an axial surface including at least two ports, a conduit in the rotor connecting the ports in pairs, and a molded rotor engaged within the cavity; the ports are spaced to correspond with the respective holes by suitable rotation and include a portion forming a pinion in the rotor, a piston engaged in each of the at least one passageway, the piston engaging the pinion portion of the rotor; the at least two shear seal assemblies in respective bores, each shear seal assembly having an annular seal body mounted in a respective bore, the seal body being in an axial plane of the rotor; a rotary chassis seal hydraulic valve, characterized in that the annular seal body provides a sliding seal against the wall of the aperture, the annular seal body having a spring that is biased into engagement with the bore; 2. The rotary chassis seal hydraulic valve according to claim 1, comprising a sealing device for sealing a space between the valve body and the valve housing. 3. The invention according to claim 1, wherein the main body has a molded recess, the housing has a molded flange engaged with the recess, and a sealing device on the flange seals the housing and the main body. Pressure valve. 4. The invention according to claim 1 further includes a thrust bearing assembly installed between the rotor and the valve body, the thrust bearing assembly engaging the thrust surface installed in contact with the main body and the rotor and the thrust surface. Rotating chassis seal hydraulic valve containing multiple thrust needles. 5. The rotary chassis seal hydraulic valve of claim 1 including means for attaching the valve to the assembly. 6. The rotary chassis seal hydraulic valve according to the invention as claimed in claim 1, wherein the valve is a three-way valve. 7. The rotary chassis seal hydraulic valve according to the invention as claimed in claim 1, wherein the valve is a four-way valve. 8. The rotary shear seal hydraulic valve according to claim 1, wherein the piston is reciprocated in both directions by a fluid device. 9. The rotary chassis seal hydraulic valve according to claim 1, wherein the piston is spring-loaded and is driven in the first direction by fluid pressure and returned by the spring action. 10. The invention according to claim 1, further comprising a pair of pistons in the pair of passages on opposite sides of the molding cavity, each piston having a portion defining a rack that engages a pinion portion of the rotor; Rotating chassis seal hydraulic valve that reliably drives the valve between open and closed positions. 11. The rotary chassis seal hydraulic valve according to claim 1, wherein the valve is normally open. 12. The rotary chassis seal hydraulic valve according to claim 1, wherein the valve is normally closed. 13. The rotary chassis seal hydraulic valve according to claim 1, further comprising a manual overloading device fixed to the rotor in a fixed position for overloading the piston. 14. The rotary chassis seal hydraulic valve according to claim 1, further comprising a solenoid device fixed to the valve body and reciprocating the piston. 15. A rotary chassis seal hydraulic valve comprising: a valve housing and a valve body that together define a generally cylindrical cavity of stepped cross section; and a first passageway in the valve body that communicates along the chord of the cavity. at least two holes in the valve housing having at least one hole on a curve parallel to the cavity and concentric with the axis communicating with the cavity; and a shaped rotor engaged within the cavity. , the rotor has an axial surface containing at least two ports, a conduit in the rotor connects the ports in pairs, appropriate rotation of the rotor causes the ports to be spaced to match the respective holes, and a pinion is attached to the rotor. a first piston engaged within the first passageway, the piston having a portion defining a rack that engages a pinion portion of the rotor; a shear seal assembly in each of the at least two apertures, each shear seal assembly having an annular seal body mounted in a respective aperture; A rotary shear seal hydraulic valve, characterized in that the annular seal body provides a sliding seal against the wall of the hole, the annular seal body having a spring for pressing the body into engagement with the axial surface of the rotor. 16. The invention of claim 15, wherein the housing has a rearwardly facing recess surrounded by a flange engaged within a recess in the body to form a large first portion of the cavity. . 17. The invention according to claim 15 further includes a thrust bearing assembly installed between the rotor and the valve body, the thrust bearing assembly comprising a thrust race attached in contact with the body, and a thrust race between the rotor and the thrust race. a thrust needle bearing engaged with a rotating chassis seal hydraulic valve; 18. The invention of claim 15, wherein the rotary chassis seal hydraulic valve includes means for attaching the valve to the assembly. 19. The invention of claim 15, wherein the valve is a three-way valve and includes two interconnected ports in the rotor and three holes in the valve housing, one of the holes being connected to the rotor. The rotary chassis seal hydraulic valves are concentric and the other two are on a curve concentric with the rotor axis. 20. The invention of claim 15, wherein the valve is a four-way valve and includes two pairs of interconnected ports in the rotor and four holes in the valve housing, the four holes being aligned with the axis of the rotor. Rotating chassis seal hydraulic valve on a concentric curve. 21. The invention according to claim 15, wherein the rotary chassis seal hydraulic valve includes ports at both ends of the first passage, whereby a piston is reciprocated in both directions by a fluid device. 22. The invention according to claim 15, further comprising at least one port at one end of the first passage and a spring device acting on the piston, whereby the piston is pressed by the spring and the first passage is opened by fluid pressure. Rotating chassis seal hydraulic valve driven in direction and returned by spring action. 23. In the invention according to claim 15, the first molding cavity
a second passage on the opposite side from the passage; and a second passage in the second passage.
pistons, each piston having a portion forming a rack that engages a pinion portion of the rotor, thereby positively driving the valve between open and closed positions. 24. The rotary chassis seal hydraulic valve of claim 15, further comprising a manual override device coupled to the rotor to hold the rotor in a fixed position against movement by the piston. 25. The rotary chassis seal hydraulic valve according to claim 15, including at least one solenoid fixed to the valve body and reciprocating a piston.