JPH0361035B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention includes a ram that slides reciprocatingly within a cylinder, and generates high-pressure fluid while suctioning and pressurizing fluid by the ram's reciprocating sliding. It is related to the device.

[Prior Art] A cylinder is provided with a ram that slides reciprocatingly at one end, and a pressure intensifying chamber is formed with an inlet and an outlet for fluid at the other end. A high-pressure fluid generator that sucks in, pressurizes, and then flows out is particularly used as a device for generating ultra-high-pressure fluid.
It is known from publications such as No. 88947 and Japanese Utility Model Application Publication No. 80697/1983.

[Problems to be Solved by the Invention] However, in the method disclosed in JP-A No. 56-88947, a lubricating oil tank is installed outside the high pressure generator, and high pressure fluid is guided to the pressurized side of this tank for lubrication. It is a device that pumps oil, and a spring is attached to the pressure side, but the main purpose of this spring is to secure the pressure of the lubricating oil, and even though this spring has a buffering effect, it is difficult to prevent damage to the spring. There is no detection means and the equipment is not protected.

Furthermore, the configuration shown in JP-A-57-80697 is one in which a lubricating oil tank is housed in a pump, and its function and effect are almost the same as those of JP-A-56-88974 mentioned above. No consideration is given to means for externally detecting the condition and the condition of the lubricating oil.

In the high-pressure fluid generating device that generates high-pressure fluid through the reciprocating sliding of the ram, a failure in the supply of lubricating oil or insufficient buffering force may cause damage to the device.
There is a big problem that leads to accidents, and many efforts are being made to solve this problem.
Since the device is for generating high-pressure fluid, it was not considered appropriate.

The present invention provides an apparatus for generating high pressure using a ram that slides back and forth within such a cylinder.
It supplies lubricating oil at the same pressure as the high-pressure fluid generated to the sliding parts of the ram, smoothing the reciprocating motion of the ram and preventing leakage of high-pressure fluid, and instantly detects the lack of lubricating oil or buffering force. The purpose of this is to establish protection for equipment and prevent accidents from occurring.

[Means for Solving the Problems] The present invention includes a ram 2 that slides back and forth at one end of a cylinder 1, and a pressure intensifying chamber 6 with a fluid inlet 7 and an outlet 8 opened at the other end. At the same time, a cylinder section 14 is formed that includes a piston 13 that crosses the pressure intensifying chamber 6, and one side of the piston 13 in the cylinder section 14 is used as an oil chamber 16, and the other side accommodates viscous fluid via a movable partition wall 27. forming a buffer chamber 28,
The oil chamber 16 is connected to a lubricating oil supply source 17 via a check valve 18.
and a groove 15 provided on the side surface of the piston 13 between the pressure increasing chamber 6 and the piston 13 and the movable bulkhead.
further communicates with the piston 13 via the detection rod 2.
4 is implanted so that it can penetrate the oil chamber 16 and protrude to the outside, and a detection rod 29 is also implanted in the movable partition wall 27 so that it can penetrate the buffer chamber 28 and protrude to the outside, and these detection rods 24, This high-pressure fluid generating device is characterized in that limit switches 25 are provided at detection positions opposite to the rams 29 and each limit switch 25 is connected to stop the drive source of the ram 2.

[Embodiment] An embodiment of the present invention will be described in detail below with reference to the drawings.

In the illustrated example, 1 is a cylinder, and a ram 2 that slides back and forth is built into the cylinder 1, and a packing 4 with an oil supply ring 3 interposed in the sliding part is supported by a flange 5. There is. Reference numeral 6 denotes a pressure increasing chamber formed within the cylinder 1, with one end facing the ram, and the other end having an inlet 7 and an outlet 8 for fluid. An inlet 10 connected to a fluid supply source (not shown) is connected and fixed at a flange 11, and an outlet 8 is connected and fixed via a check valve 9 to an outlet 12 at a flange 12.

Further, a cylinder part 14 having a built-in piston 13 that crosses the pressure intensifying chamber 6 is formed between the inlet port 7 and the outlet port 8 and the ram 2, and one side of the piston 13 in the cylinder part 14 is connected to the pressure intensifying chamber 6. The piston 13 communicates with each other through a groove 15 formed on the side surface of the piston 13.
The other side of 3 is an oil chamber 16, and the oil chamber 16 and a lubricating oil supply source 17 are communicated through a conduit 19 equipped with a check valve 18, and an oil chamber 16 and a lubricating oil supply source 17 are provided in a sliding part of the ram 2. It communicates with the oil supply ring 3 through a conduit 20. 21, 22 are oil supply flanges, 23
is an air vent flange communicating with the oil supply ring 3.

Furthermore, a detection rod 24 is installed in the piston 13,
It penetrates the oil chamber 16 and the oil supply flange 21 and can protrude to the outside of the cylinder 1, and a limit switch 25 is provided at a detection position facing the oil chamber 16 and the oil supply flange 21, and this is communicated to stop the drive reduction of the ram 2.

The opposite side of the oil chamber 16 of the piston 13 is sealed with a flange 26, and a buffer chamber 28 is formed at the end of the piston 13 through a movable partition wall 27. A detection rod 29 is installed in the movable partition wall 27 to accommodate oil so as to be able to protrude outside the cylinder 1, and a limit switch 25 is provided at a detection position facing the detection rod 24 installed in the piston 13.

The piston 13, the movable partition wall 27, and the pressure increase chamber 6 communicate with each other through the groove 15 described above.

In the figure, 30 is a flange that seals the end of the pressure increase chamber 6, 31 is a pressure regulating valve provided at the high-pressure fluid outlet 12, and 32 is a pressure gauge.

Next, to explain its operation, the ram 2 slides back and forth within the cylinder 1, and the fluid is transferred from the inlet 7 to the pressure increasing chamber 6.
The high-pressure fluid is drawn into the piston 13 and flows out from the outlet 8 as a high-pressure fluid, and the high-pressure fluid acts to press the piston 13 through the groove 15 of the piston 13. The pressure of the lubricating oil supplied from the lubricating oil supply source 17 into the oil chamber 16 by the pressure of the piston 13 becomes equal to the pressure of the high-pressure fluid generated in the pressure intensifying chamber 6, and then passes through the conduit 20 and the oil supply ring 3. Since the lubricating oil that has reached the sliding portion of the ram 2 has the same pressure as the high-pressure fluid, leakage of the high-pressure fluid from the sliding portion is prevented.

Furthermore, when the lubricating oil in the oil chamber 16 is insufficient, the distance that the piston 13 moves naturally increases.
Since the detection rod 24 protrudes outside the cylinder 1 as shown by the broken line, the detection rod 24 comes into contact with the limit switch 25 and automatically stops the drive of the ram 2, stopping the operation of the device and protecting the device. Measures to prevent accidents.

Further, the detection rod 29 of the movable partition wall 27 that divides the buffer chamber 28 is used in the same manner as the detection rod installed in the piston 13 to detect a lack of buffer material or a lack of buffer force in the buffer chamber 28, The operation of the vehicle can be stopped.

[Effects of the Invention] As described above, the present invention provides an apparatus for generating and discharging high-pressure fluid by sliding a ram back and forth.
By making the pressure of the lubricating oil supplied to the sliding parts of the ram equal to the pressure of the generated high-pressure fluid, smooth movement of the ram can be achieved, and at the same time, leakage of high-pressure fluid can be accurately prevented. If there is a shortage of buffering power or buffering force, it is instantly detected and the operation of the device is automatically stopped, thereby establishing protection for the device and further preventing accidents from occurring.

[Brief explanation of drawings]

The drawing is a sectional view showing an embodiment of the present invention. 1... Cylinder, 2... Ram, 3... Oil supply ring, 4... Packing, 6... Pressure increase chamber, 7... Inlet, 8... Outlet, 13... Piston, 14...
...Cylinder part, 15...Groove, 16...Oil chamber, 17
... Lubricating oil supply source, 18 ... Check valve, 24 ... Detection rod, 25 ... Limit switch, 26 ... Flange, 27 ... Movable bulkhead, 28 ... Buffer chamber, 29
...Detection stick.

Claims (1)

[Claims] 1 A piston 13 that is provided with a ram 2 that slides reciprocatingly at one end of the cylinder 1 and forms a pressure intensifying chamber 6 with a fluid inlet 7 and an outlet 8 opened at the other end, and that crosses the pressure intensifying chamber 6. The piston 13 in the cylinder part 14 has an oil chamber 16 on one side and a buffer chamber 28 containing viscous fluid via a movable partition wall 27 on the other side, and the oil chamber 16 is reversed. It communicates with a lubricating oil supply source 17 via a stop valve 18, and also communicates with an oil supply ring 3 provided on the sliding part of the ram 2, and connects the pressure increasing chamber 6, the piston 13, and the movable partition between the piston 13 and the side surface of the piston 13. Further, a detection rod 24 is installed in the piston 13 so that it can penetrate the oil chamber 16 and protrude to the outside, and a detection rod 29 is also installed in the movable bulkhead 27 to provide a buffer. These detection rods 2 can penetrate the chamber 28 and protrude to the outside.
4 and 29, respectively, and each limit switch 25 is connected to stop the drive source of the ram 2.