JPH0334818B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is applicable to, for example, an automobile assembly factory.
This invention relates to a fluid distribution device for an internal combustion two-tube test facility that performs performance tests on internal combustion engines before they are assembled into a vehicle body.

BACKGROUND OF THE INVENTION In internal combustion engine testing equipment, the internal combustion engine is mounted on a pallet, the pallet and the pallet are fed into a testing device, and after a desired performance test is performed, the engine is taken out along with the pallet. By the way, when performing performance tests, fuel, cooling water, air, etc. are supplied and the internal combustion engine is operated.
At that time, a plurality of internal combustion engine test devices were installed radially on the rotary table, and fuel was supplied to the internal combustion engine installed corresponding to the test devices through a multi-tube joint installed at the rotation axis of the rotary table. We are supplying such things as That is, conventionally, as seen in, for example, Japanese Utility Model Publication No. 42-17043, an inner hole is formed in the center of an upright fixed shaft, and a plurality of passage holes are formed around this inner hole. A rotary exhaust pipe is connected to the upper end of the inner hole via a rotary joint, and each square passage hole is connected to a rotary supply pipe through a common rotary shaft fitted onto the fixed shaft. and cooling water.

Problems to be Solved by the Invention According to the conventional type described above, when the seal of the rotary joint that distributes fuel and cooling water breaks, the leaked fluids tend to mix and flow into other pipes, and the test This will adversely affect the intended testing on the device. In particular, if fuel leaks, the damage will be great, including staining the surrounding area.

An object of the present invention is to provide an internal combustion engine capable of preventing mixing due to leakage from a seal portion, quickly detecting fuel leakage, and supplying fuel and cooling water without adversely affecting each other. The present invention provides a liquid dispensing device for testing equipment.

Means for Solving the Problems In order to solve the above problems, a fluid distribution device for an internal combustion engine test facility according to the present invention is provided with a rotary table having a plurality of internal combustion engine test devices radially, and the rotation axis of the rotary table is A fuel pipe consisting of a single pipe is installed in the fuel pipe, a fuel supply pipe is connected to the lower end of this fuel pipe, a fuel distribution pipe is connected to the upper end via a fuel rotary joint, and the middle part of the fuel pipe is connected to the fuel supply pipe. A first fluid pipe for air is fitted and fixed on the outside, a first fluid supply pipe is connected to the lower end of the first fluid pipe, and the upper end is connected to the first fluid distribution pipe via a first rotary joint,
A second fluid pipe for cooling water is externally fitted and fixed to the middle part of the first fluid pipe, and a second fluid supply pipe is connected to the lower end of the second fluid pipe, and the upper end is connected to the second fluid pipe through a second rotary joint. Connected to the second fluid distribution pipe, each rotary joint has a sealing device, and the fuel rotary joint is provided with a detection device for detecting seal leakage.

According to the configuration of the present invention, by connecting each supply pipe to a fuel tank or the like disposed outside the rotary table, fuel and each fluid can be distributed through separate rotary joints provided in stages. Furthermore, even if one of the sealing devices of each rotary joint is damaged, the sealing device of the rotary joint can prevent fluid leaked from the damaged portion from entering the other rotary joint. In addition, since the fuel pipe is a single pipe, damage from connections etc. is less likely to occur.
Furthermore, damage to the sealing device can be quickly detected and damage can be minimized. Then, an air layer for heat insulation is formed between the fuel and the cooling water.

Embodiment An embodiment of the present invention will be described below based on the drawings.

In Figures 1 and 2, reference numeral 1 denotes a delivery path for a pallet on which a fuel engine is placed, including a first delivery conveyor 2 and a feeder with a turntable disposed outside the end of the first delivery conveyor 2. It is formed by a device 3 and a second carry-in conveyor 4 which is located orthogonally to the first carry-in conveyor 2 and to which the turntable of the supply device 3 can be freely connected. You've hit the right spot. This rotary table 5 has a plurality of internal combustion engine test devices 6 radially arranged to receive pallets from the carry-in route 1. Reference numeral 7 denotes a carry-out route, which includes a first carry-out conveyor 8 that can freely receive the pallets from the internal combustion engine testing device 6 at the carry-out part that has made approximately one turn from the carry-in part described above and is parallel to the second carry-in conveyor 4.
, a discharge device 9 with a turntable that is connectable to the first discharge conveyor 8 and has a turntable, a second discharge conveyor 10 that is connected to the discharge device 9 and faces in the same direction as the first carry-in conveyor 2, etc. formed by. The rotary table 5
A distribution device 12 for supplying cooling water, fuel, and air is provided at the rotation axis 11 of
A fuel tank 13 communicating with the rotary table 5, a rotary drive device 14 interlocked with the rotary table 5, and the like are provided. The rotary table 5 is supported and guided by a tubular rail 17 attached to the base frame 16 via a plurality of wheels 18.

Next, details of the distribution device 12 will be explained based on FIGS. 2 and 3. A pedestal 20 is fixedly installed below the rotary table 5, a base plate 21 is attached to the upper surface of the pedestal 20, and a first fluid pipe 22 for air is connected concentrically with the rotation axis 11 to the base plate 20.
It penetrates and integrates into 1. This first fluid pipe 22
The fuel pipe 23 that penetrates the inside is held at the lower end of the first fluid pipe 22 by a holding member 24 that also serves as a seal at its lower part, and its upper part passes through the rotary table 5 and projects above the table top surface. The lower end of the fuel pipe 23 is connected to the fuel tank 13 via a fuel supply pipe 25, and the upper end is connected to a fuel distribution pipe 27 via a fuel rotary joint 26. Fuel distribution pipe 2 connected to fuel rotary joint 26
7 penetrates the rotary table 5 downward, and after being piped along the lower surface of the rotary table 5, it penetrates the rotary table 5 upward and reaches each test device 6. The fuel rotary joint 26 is connected to the fuel pipe 23
A cylindrical shaft 28 fixed to the upper end thereof, a housing 30 that is fitted onto the cylindrical shaft 28 from above and is rotatable via a bearing 29, and a pair of sealing devices (O-rings) provided on the back side of the bearing 29. It consists of 31 pieces. A detection device 32 for detecting seal leakage of both seal devices 31 is provided, and this detection device 32 includes:
For example, it is composed of an air pipe 33 that opens between both sealing devices 31 and a detection tool 34 that detects the pressurizing force in this air pipe 33. The first fluid pipe 22, which is integral with the base plate 21, has a relay pipe 3 at its lower end.
5 are connected in communication with each other, and a first fluid supply pipe 36 is further connected to the relay pipe 35. Also, rotary table 5
A first fluid distribution pipe 39 is connected to the upper end of the first fluid pipe 22 located near the lower surface of the fluid pipe 22 via a first rotary joint 37 and a relay pipe 38 . The first rotary joint 37 includes a cylindrical shaft 40 fixed to the upper end of the first fluid pipe 22 and externally fitted onto the fuel pipe 23;
a through hole 41 formed at one or more locations in the circumferential direction and in the middle in the vertical direction; a housing 43 rotatably fitted onto the cylindrical shaft 40 via a pair of upper and lower bearings 42; and an inner surface of the housing 43. and an annular groove 44 formed opposite to the through hole 41.
, a pair of upper and lower sealing devices 45 disposed between the annular groove 44 and both bearings 42 , and a coupling device 46 provided at the penetrating portion of the fuel pipe 23 to the top plate of the cylinder shaft 40 and also serving as a seal. The relay pipe 3
8 is fixed to the housing 43 and the annular groove 4
It is connected to 4. Note that a detection device 47 similar to that described above is provided corresponding to both seal devices 45.
In addition, a connecting rod 48 connected from the housing 43 is
The rotary table 5 is integrated into a bracket 49. From the base plate 21 is a second pipe for cooling water.
A fluid pipe 55 is installed upright, and this second fluid pipe 55 is fitted onto the first fluid pipe 22, and its top plate portion is
It is integrated with the first fluid pipe 22 passing through it. A relay pipe 56 is connected to the lower end of the second fluid pipe 55, and a second fluid supply pipe 57 is further connected to the relay pipe 56. Further, at the upper end of the second fluid pipe 55 located below the first rotary joint 37, a second rotary joint 5 is provided.
8 and a second fluid distribution pipe 60 is connected via a relay pipe 59. The second rotary joint 58 includes an upper portion of the second fluid pipe 55 that also serves as a cylinder axis, a through hole 61 formed at one or more circumferential locations in the vertical middle of this upper portion, and a through hole 61 formed at one or more locations in the circumferential direction. A housing 63 rotatably fitted to the upper portion of the housing 63 via a pair of upper and lower bearings 62, an annular groove 64 formed on the inner surface of the housing 63 facing the through hole 61, and an annular groove 64 and both bearings 62. The relay pipe 59 is fixed to the housing 63 and communicates with the annular groove 64. In addition, both seal devices 6
A detection device 66 similar to that described above is provided corresponding to 5, and a relay pipe 59 is supported by the bracket 49. Note that both the first fluid pipe 39 and the second fluid distribution pipe 60 are arranged along the lower surface of the rotary table 5 and reach each test device 6. Here, air 67 is shown as the first fluid, and cooling water 68 is shown as the second fluid. 69 indicates fuel.

Next, the operation of the above embodiment will be explained. The internal combustion engine placed on a pallet is transported along the delivery route 1 and sent to the test equipment 6, where it is heated with air 6.
7. To be able to supply cooling water 68 and fuel 69,
Furthermore, it is set so that exhaust gas can be discharged. Then, various driving tests are performed while rotating the rotary table 5. At this time, fuel 69 is supplied to each test device 6 via fuel supply pipe 25, fuel pipe 23, housing 30, and fuel distribution pipe 27. Since the housing 30 rotates with respect to the cylinder shaft 28 at the fuel rotary joint 26, rotation of the rotary table 5 with respect to the fuel pipe 23 is allowed. When the sealing device 31 in the fuel rotary joint 26 is ruptured, the air pressure in the air pipe 33 decreases, which is detected by the detector 34, thereby preventing fuel leakage. Also air 6
7 enters the first fluid pipe 22 via the first fluid supply pipe 36 or the relay pipe 38, and flows through the through hole 41, the annular groove 44, the relay pipe 38, and the first fluid distribution pipe 39 to each test device. Here too, rotation of the rotary table 5 is allowed by the first rotary joint 37, and damage to the sealing device 45 is detected by the detection device 47. Furthermore, the cooling water 68 enters the second fluid pipe 55 from the second fluid supply pipe 57 via the relay pipe 56, and then enters the through hole 61, the annular groove 64, and the relay pipe 5.
9, flows into the second fluid distribution pipe 60 to each test device 6
supplied to Similarly, rotation of the rotary table 5 is allowed by the second rotary joint 58, and damage to the sealing device 65 is detected by the detection device 66. In this way, the special rotary joints 26, 37, 5 are provided with fuel 69, air 67, and cooling water 68 in stages in the vertical direction.
8, the sealing device 3
Even if any one of them 1, 45, and 65 is damaged, the fluids will not mix with each other, and the damage can be detected by each of the detection devices 32, 47, and 66.

Effects of the Invention According to the present invention having the above configuration, by connecting each supply pipe to a fuel tank disposed outside the rotary table, fuel and each fluid can be supplied through separate rotary joints provided in stages. Can be distributed and supplied to each test device. Furthermore, even if one of the sealing devices of each rotary joint is damaged, the sealing device of the rotary joint can prevent fuel or fluid leaking from the damaged portion from entering the other rotary joint, Therefore, mixing can be prevented and the test equipment can always perform the desired test. Furthermore, since the fuel pipe is a single pipe, it is difficult for damage to occur at the connection part, etc., and damage to the sealing device can be quickly detected and damage caused by fuel leakage can be minimized. A heat-insulating air layer can be formed between the fuel and the cooling water, so that the fuel and the cooling water can be supplied without causing thermal effects on each other.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, with FIG. 1 being a schematic plan view, FIG. 2 being a longitudinal sectional front view of the main part, and FIG. 3 being a partially cutaway front view of the dispensing device. 5...Rotary table, 6...Internal combustion engine testing device, 11...Rotation axis, 12...Distribution device, 22
...First fluid pipe, 23...Fuel pipe, 25...Fuel supply pipe, 26...Fuel rotary joint, 27...Fuel distribution pipe, 31...Seal device, 32...Detection device, 36... First fluid supply pipe, 37... First rotary joint, 39... First fluid distribution pipe, 45... Seal device, 47... Detection device, 55... Second fluid pipe,
57...Second fluid supply pipe, 58...Second rotary joint, 60...Second fluid distribution pipe, 65...Seal device, 66...Detection device, 67...Air, 68...
Cooling water, 69...Fuel.

Claims (1)

[Claims] 1 A rotary table having a plurality of internal combustion engine test devices arranged radially is provided, a fuel pipe consisting of a single pipe is arranged at the rotation axis of the rotary table, and a fuel supply pipe is connected to the lower end of this fuel pipe, A fuel distribution pipe is connected to the upper end via a rotary joint for fuel, a first fluid pipe for air is externally fitted and fixed to the middle part of the fuel pipe, and a first fluid supply pipe is connected to the lower end of the first fluid pipe. At the same time, the upper end is connected to the first rotary joint via the first rotary joint.
connected to a fluid distribution pipe, a second fluid pipe for cooling water is externally fitted and fixed to the middle part of the first fluid pipe, and a second fluid supply pipe is connected to the lower end of the second fluid pipe;
the upper end is connected to a second fluid distribution pipe via a second rotary joint, each rotary joint having a sealing device;
A fluid distribution device for internal combustion engine testing equipment, characterized in that the fuel rotary joint is provided with a detection device for detecting seal leakage.