JP2733782B2 - High pressure pump device - Google Patents

Description

The present invention relates to a high-pressure pump device.

There are two major problems with high-pressure pumps, especially those that pump non-lubricating fluids such as water and exceed 1,000 atmospheres. A) difficulties in sealing the membrane members, which may cause leakage, and a change in the load on the tightening bolts, which shortens their useful life; and b) connects to the electric motor. In this case, the pump rotates at a high speed, and the valve and the membrane member perform a large number of reciprocating motions (strokes) in a short time, so that their service life is limited to several hundred hours. Even if a gear device is provided between the pump and the pump, there is a problem that the device is large in size, large in weight and expensive because the power transmitted by the device is very large.

The present invention solves the above problem by using a control valve instead of using a transmission device between the drive motor and the pump.

To make this solution effective, a small reduction gear is used between the drive motor and the pump. In order to improve the sealing structure of the membrane member and prolong the service life of the tightening bolt, a circular annular portion and a leak reservoir recess are provided on the body member which abuts against the membrane member and tightens them, and is sealed. Also, when high pressure is applied to one of the chambers, low pressure is applied to the other of the chambers, so that the load on the tightening bolt is always increased because those chambers are arranged in the axial direction. The load is uniform and the load is not changed.

The details of the above arrangement according to the present invention are defined in the appended claims.

Some of the details of the arrangement according to the invention are set forth in the accompanying drawings.
FIG. 1 is a longitudinal sectional view showing one embodiment of the high-pressure pump device of the present invention, FIG. 5 is a transverse sectional view of the device, and FIGS. Control valve 17 in FIG.
FIG.

The medium pressure supply pump 19 has a shaft or rotor 20 provided with reduction gears 21 and 22 and a low-speed rotation control valve (or simply a control valve) 17 via these. The medium pressure supply pump (hereinafter abbreviated as “pump”) 19 is provided between
The medium pressure fluid is sent to the control valve 17. This control valve 17
Has a fluid passage and opening for high-pressure fluid, designated by the symbol H, which switchably sends fluid from the fluid passages 26, 27 to at least two cylinders 14, 15, 16, , 5 and piston device 9,6 or piston device
10 and 7 are also driven upward during the discharge stroke to displace the fluid, preferably oil, in the first or outer chambers 11, 12, 13 (first
(Fig.) Or pump to chambers 135, 235 (Fig. 5). By this discharge stroke, the membrane member 58 (FIG. 5) moves from the first or outer chamber 135,235 to the second or inner chamber 137,237 (FIG. 5).
During the return stroke of the piston from the inlet valves 138, 238 (FIG. 5).
High-pressure fluid, for example, water, contained in 37,237
It is discharged from 139,239. The return stroke of the piston consists of intermediate chamber components 44, 45, 45, which supply fluid under a return pressure to the cross-sectional area occurring between the large and small diameters of the cylinder and the piston.
46, 47, 63. The members and means indicated by reference numerals other than those described above in the accompanying drawings are, for example, accessories such as valves, which are known in the art or known to those skilled in the art. The description is omitted here. Further, a configuration relating to the above-described return stroke is also known in this technical field.

The novel point and novel operation and effect of the present invention reside in the points described in the claims described at the beginning of this specification.

That is, reduction gears or reduction gears 21 and 22 are provided between the pump 19 and the control valve 17 rotated by the pump 19. According to the configuration of the present invention, the number of reciprocating movements (strokes) of the piston, the membrane member, and the valve per unit time can be reduced. Thus, the useful life of these components can be extended and the need to provide large or heavy reduction gears between the power source or drive motor and the pump is avoided. According to the invention, it is preferred that the speed reduction ratio be very large and that the speed of the control valve 17 does not exceed 10 revolutions per second, more preferably about 5 revolutions per second or less.

Another important construction feature according to the present invention is shown in FIG. That is, the membrane member 58 is a bolt (with a nut or head 66) between the radially flat surfaces of the body members A and B or C and D forming the first chamber 135,235 or the second chamber 137,237. 4 is held tight. Radially outward of the first and second chambers, the end faces of body members A, B, C and D are planar, and membrane member 58 is a flat plate member having parallel axial end faces. Also, the flat end faces of the body member are parallel to each other. Displaced slightly radially outward from the first and second chambers, leak reservoir recesses 61, 62 are formed in the body member in the form of circular depressions from the flat end surface of the body member. Have been. These recesses 61,6
2 is connected to the leak outlet. An important sealing arrangement is provided between the chambers 135,235,137,237 and the recesses 61,62. These sealing components are circular annuli of the body member, which engage corresponding parts of the axial end faces of the membrane member, and the flat surfaces of the annuli are bolts 4 (and their holdings). Since they are mutually pressed (tightened) by means or nuts 66), the membrane member is sealed. Along the sealing arrangement, if a leak escapes, it enters the leak reservoir recesses 61,62. The radially outer end face of the membrane member 58 has a recess 61,
62 radially outward portion and adjacent body members A, B, C, D
And seals the recesses 61, 62 radially outward and provides a good balance of compressive stress and bolt elongation on portions of the membrane member.

The important point according to the invention is that, reversibly, the chamber 135,
When the high pressure is applied to 137, the chambers 235 and 237 are configured to be applied with low pressure. According to the invention, it is preferred that the operation of the control valve is very perfect and there is no time lag when switching the pressure from the chambers 135, 137 to the chambers 235, 237 and vice versa. According to this configuration, the stress generated in the bolt 4 provided with the (holding means 66 such as a nut) due to the high pressure in each chamber during the discharge stroke can always be made uniform. As a result, a change to a low pressure is prevented, and a uniform internal elongation stress is always applied to the bolt 4, so that a change in load and stress applied to the bolt is prevented, and a service life can be extended. Furthermore, the compressive stresses in the sealing components of the membrane member and the body member are also very substantially uniform, preventing this change in the compressive stress, and thus also providing a reliable service life of the membrane member and the body member. Life prolonged.

Further details of the invention are set forth in the following claims, and it is therefore to be understood that these claims form a part of the detailed description of the invention and the description of the embodiments thereof.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of the high-pressure pump device of the present invention. FIGS. 2, 3 and 4 are similar to FIGS.
FIG. 2 is a cross-sectional view showing the control valve 17 shown in FIG. 2, FIG. 2 is a cross-sectional view of a portion corresponding to the discharge fluid passage 24 or 25, and FIG.
A cross-sectional view showing a fluid passage from the medium pressure supply pump 19,
FIG. 4 is a cross-sectional view of a portion corresponding to the cylinders 14, 15, 16 and the like. FIG. 5 is a cross-sectional view of the pump device shown in FIG. 4 bolts (with retaining means or nuts 66), 5, 8,
9,10,101,108,205,208 …… Piston, 11,12,13,14,15,1
6 ... cylinder, 17 ... control valve, 19 ... medium pressure supply pump (or simply pump), 20 ... shaft or rotor, 21, 22
... reduction gear or reduction gear, 35,135,235 ... (first or outer) chamber, 37,137,237 ... (second or inner)
Chamber 58, membrane member 61, 62 leak reservoir recess 138 inlet valve 139 outlet valve.

Claims (3)

(57) [Claims] A piston for pumping the membrane member;
A high-pressure pump device configured to send a high-pressure fluid to an outlet valve by means of the membrane, wherein a membrane member (58) is clamped and held between two adjacent main body members, and one of the main body members is provided with a membrane. A chamber (35,135,235) is formed on one side of the member (58), and the other of the main body members communicates with the inlet valve (138) and the outlet valve (139) on the other side of the membrane member (58). Chamber (37, 137, 237), the membrane member (58) has a substantially circular shape, and the chamber (35, 135, 235; 37,
137, 237), which are tightly held and sealed by the circular annular portion of the main body member radially outward, and the leakage recesses (61, 62) are formed radially outward of the circular annular portion. A high-pressure pump device characterized in that an outer portion of the membrane member (58) extends to a portion extending outside the main body member. 2. At least two pistons (5, 10) provided reciprocally in a cylinder (11, 12, 13, 14, 15, 16).
1,205,8,108,208,9,10), switching of the fluid flow from the medium pressure supply pump (19) following the simultaneous operation of the medium pressure supply pump (19) and the piston (5,101,205,8,108,208,9,10) A high-pressure pump device having a control valve (17) for performing control, comprising a rotor or a shaft (2) of a medium pressure supply pump (19).
0) and control valve (17) between the speed reducer (21,22)
The high-pressure pump device according to claim 1, further comprising: 3. A membrane member (58) and a chamber (35, 135, 235; 37, 137, 23).
7) At least two sets of circular annular parts and recesses (61, 62) are provided in the axial direction, which are tightened with bolts (4, 66).
The high pressure fluid is passed through one of the chambers (35, 135, 235) and the chambers (37, 137, 237), and the low pressure fluid is passed through the other, and the high pressure fluid and the low pressure fluid in these chambers are simultaneously switched. (4,66),
2. A structure according to claim 1, wherein a high-pressure load in one of the chamber (35, 135, 235) and the chamber (37, 137, 237) is always constant, and the load applied to these bolts (4, 66) does not change. 3. The high-pressure pump device according to 2.