U.S. patent application number 16/832885 was filed with the patent office on 2021-04-29 for multi-point supported five cylinder plunger pump.
The applicant listed for this patent is YANTAI JEREH PETROLEUM EQUIPMENT & TECHNOLOGIES CO., LTD.. Invention is credited to Haiping Cui, Wenping Cui, Yanjing Sun, Xiaosong Wei.
Application Number | 20210123434 16/832885 |
Document ID | / |
Family ID | 1000004736663 |
Filed Date | 2021-04-29 |
![](/patent/app/20210123434/US20210123434A1-20210429\US20210123434A1-2021042)
United States Patent
Application |
20210123434 |
Kind Code |
A1 |
Cui; Haiping ; et
al. |
April 29, 2021 |
MULTI-POINT SUPPORTED FIVE CYLINDER PLUNGER PUMP
Abstract
The present invention discloses a multi-point supported five
cylinder plunger pump, including a power end assembly, a hydraulic
end assembly and a reduction gearbox assembly, the power end
assembly includes a crankcase, a crosshead case and a spacer frame,
the crankcase, the crosshead case and the spacer frame are
connected in sequence, the hydraulic end assembly is fixed on the
spacer frame, the reduction gearbox assembly is fixed on the
crankcase, a crankshaft support is disposed at the bottom of the
crankcase, and the crankshaft support is used to support the
crankcase, a crosshead support is disposed at the bottom of the
crosshead case, and the crosshead support is used to support the
crosshead case, a hydraulic support is disposed at the bottom of
the spacer frame, and the hydraulic support is used to support the
hydraulic end assembly. Beneficial effects: the multi-point support
design of the crankcase, the crosshead case and the hydraulic end
assembly can enhance the support strength of the plunger pump and
reduce the vibration, thus better ensuring high load operation and
more smoothly running.
Inventors: |
Cui; Haiping; (Yantai,
CN) ; Cui; Wenping; (Yantai, CN) ; Wei;
Xiaosong; (Yantai, CN) ; Sun; Yanjing;
(Yantai, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
YANTAI JEREH PETROLEUM EQUIPMENT & TECHNOLOGIES CO.,
LTD. |
Yantai |
|
CN |
|
|
Family ID: |
1000004736663 |
Appl. No.: |
16/832885 |
Filed: |
March 27, 2020 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
F04B 1/0538 20130101;
F04B 1/00 20130101; F04B 53/16 20130101 |
International
Class: |
F04B 53/16 20060101
F04B053/16; F04B 1/00 20060101 F04B001/00 |
Foreign Application Data
Date |
Code |
Application Number |
Oct 29, 2019 |
CN |
201911036873.7 |
Claims
1. A multi-point supported quintuplex plunger pump, including a
power end assembly, a hydraulic end assembly and a reduction
gearbox assembly; the power end assembly comprises a crankcase, a
crosshead case and a spacer frame; the crankcase, the crosshead
case and the spacer frame are connected in sequence; the hydraulic
end assembly is fixed on the spacer frame; the reduction gearbox
assembly is fixed on the crankcase; a crankshaft support is
disposed at the bottom of the crankcase, and the crankshaft support
is used to support the crankcase; a crosshead support is disposed
at the bottom of the crosshead case, and the crosshead support is
used to support the crosshead case; a hydraulic support is disposed
at the bottom of the spacer frame, and the hydraulic support is
used to support the hydraulic end assembly, wherein cylinder
spacing of the quintuplex plunger pump is 13-14 inches, and there
are two slide rails fixed on the support plate within the power end
housing, the two slide rails form a semi-circular space, in which a
crosshead is mounted for reciprocating linear motion.
2. The multi-point supported quintuplex plunger pump according to
claim 1, wherein the crankcase and the crosshead case are
integrally welded to constitute a power end housing which is
connected to the spacer frame; the power end housing comprises six
vertical plates, six bearing seats, a front end plate, a back cover
plate, a base plate, a support plate and an upper cover plate; each
vertical plate is connected to a corresponding bearing seat, and
the six vertical plates are arranged in parallel to constitute a
power end chamber; the base plate is mounted at the bottom of the
power end chamber, the upper cover plate is mounted on the top of
the power end chamber; the front end plate is mounted at the front
end of the power end chamber; the back cover plate is mounted at
the back end of the power end chamber, and the support plate is
disposed between two adjacent vertical plates arranged in
parallel.
3. The multi-point supported quintuplex plunger pump according to
claim 1, wherein a crosshead assembly is provided within the
crosshead case, a connecting rod assembly is provided between the
crankcase and the crosshead case, and a crankshaft is provided
within the crankcase; one end of the connecting rod assembly is
connected to the crankshaft through a connecting rod bearing bush,
and the other end of the connecting rod assembly is connected to
the crosshead assembly through a crosshead bearing bush; the
connecting rod bearing bush and the crosshead bearing bush are both
alloy coated steel backing bearing bushes.
4. (canceled)
5. (canceled)
Description
TECHNICAL FIELD
[0001] The present invention relates to the technical field of
plunger pumps, and specifically to a multi-point supported five
cylinder plunger pump.
BACKGROUND
[0002] With the further development of unconventional oil and gas,
shale oil and gas, the pressure and displacement requirements of
fracturing operations are increasing, not only the operating
pressure increases with the increase of horizontal well depth, but
also the displacement required by a single well is higher and
higher, as a result, the scale of fracturing operation becomes
larger and larger, and the harsh operating conditions also put
forward higher requirements for fracturing equipment, especially
for the plunger pump. At present, in the development process of
shale oil and gas, the operating pressure generally reaches 80-90
MPa or even higher, and the single-stage operating displacement is
also generally 1800 m.sup.3-2000 m.sup.3 or even higher. Therefore,
the plunger pump should not only be able to meet the continuous
operation of high pressure and large displacement, but also ensure
the quality stability under continuous high load operation, reduce
the pump stop time and maintenance time. The most widely used
fracturing truck on the market today is the 2500 fracturing truck
equipped with a plunger pump of 2800 hp, other commonly used
fracturing pumps include a 2500 hp pump, a 3300 hp pump, a 4000 hp
pump and the like. Take the 2800 hp pump for example, due to power
limitation, the single pump displacement is lower in high pressure
operation. For a shale gas wellsite with a single-stage
displacement requirement of 14-16 m.sup.3/min, near 20 fracturing
trucks are totally needed to operate simultaneously to meet the
total displacement requirements of fracturing operations. This will
take up a large area of the wellsite, and increase the difficulty
of equipment arrangement in narrow oil and gas field wellsite.
Moreover, under increasingly harsh operating conditions, the
frequency of problems on conventional plunger pumps is also
increasing under high load operations for long time, increasing the
maintenance and repair cost. In recent years, electric drive
fracturing operations have emerged in which electric motors are
used to solve the problem of constraints on diesel engine power,
which are more suitable for driving high-power plunger pumps.
[0003] With the increase of plunger pump power, higher requirements
are put forward for the operation stability and support strength of
the plunger pump itself.
SUMMARY
[0004] To overcome the deficiencies in the prior art, an objective
of the present invention is to provide a multi-point supported five
cylinder plunger pump, the multi-point support design of a
crankcase, a crosshead case and a hydraulic end assembly can
enhance the support strength of the plunger pump and reduce the
vibration, thus better ensuring high load operation and more
smoothly running. In the power end assembly of the five cylinder
plunger pump, the crankcase and the crosshead case are integrally
welded so that the power end assembly has a higher structural
strength and a better support stability, thus reducing the
vibration of the whole pump. The cylinder spacing of the five
cylinder plunger pump is designed to be 13-14 inches to increase
the bearing areas of the connecting rod, the crosshead and the
bearing bush, thus ensuring the high power output of the five
cylinder plunger pump, specifically the power of the five cylinder
plunger pump can be up to 7000 hp. The high-power five cylinder
plunger pump can effectively solve the problems of narrow shale gas
fracturing wellsite area and requirement for multiple fracturing
equipment, and reduce the use of equipment so as to facilitate the
wellsite arrangement.
[0005] The objective of the present invention is achieved by the
following technical measures: a multi-point supported five cylinder
plunger pump, including a power end assembly, a hydraulic end
assembly and a reduction gearbox assembly, wherein the power end
assembly includes a crankcase, a crosshead case and a spacer frame,
the crankcase, the crosshead case and the spacer frame are
connected in sequence, the hydraulic end assembly is fixed on the
spacer frame, the reduction gearbox assembly is fixed on the
crankcase, a crankshaft support is disposed at the bottom of the
crankcase, and the crankshaft support is used to support the
crankcase, a crosshead support is disposed at the bottom of the
crosshead case, and the crosshead support is used to support the
crosshead case, a hydraulic support is disposed at the bottom of
the spacer frame, and the hydraulic support is used to support the
hydraulic end assembly.
[0006] Further, the crankcase and the crosshead case are integrally
welded to constitute a power end housing which is connected to the
spacer frame, the power end housing includes a vertical plate, a
bearing seat, a front end plate, a back cover plate, a base plate,
a support plate and an upper cover plate; there are six vertical
plates and six bearing seats, each vertical plate is connected to a
corresponding bearing seat, and the six vertical plates are
arranged in parallel to constitute a power end chamber; the base
plate is mounted at the bottom of the power end chamber, the upper
cover plate is mounted on the top of the power end chamber, the
front end plate is mounted at the front end of the power end
chamber, the back cover plate is mounted at the back end of the
power end chamber, and the support plate is disposed between two
adjacent vertical plates arranged in parallel.
[0007] Further, a crosshead assembly is provided within the
crosshead case, a connecting rod assembly is provided between the
crankcase and the crosshead case, and a crankshaft is provided
within the crankcase, one end of the connecting rod assembly is
connected to the crankshaft through a connecting rod bearing bush,
the other end of the connecting rod assembly is connected to the
crosshead assembly through a crosshead bearing bush, the connecting
rod bearing bush and the crosshead bearing bush are both alloy
coated steel backing bearing bushes.
[0008] Further, the cylinder spacing of the five cylinder plunger
pump is 13-14 inches.
[0009] Compared with the prior art, the present invention has the
following beneficial effects: the multi-point support design of a
crankcase, a crosshead case and a hydraulic end assembly can
enhance the support strength of the five cylinder plunger pump and
reduce the vibration, thus better ensuring high load operation and
more smoothly running. In the power end assembly of a five cylinder
plunger pump, the crankcase and the crosshead case are integrally
welded so that the power end assembly has a higher structural
strength and a better support stability, thus reducing the
vibration of the whole pump. The cylinder spacing of the five
cylinder plunger pump is designed to be 13-14 inches to increase
the bearing areas of the connecting rod, the crosshead and the
bearing bush, thus ensuring the high power output of the five
cylinder plunger pump, specifically the power of the five cylinder
plunger pump can be up to 7000 hp. The high-power five cylinder
plunger pump can effectively solve the problems of narrow shale gas
fracturing wellsite area and requirement for multiple fracturing
equipment, and reduce the use of equipment so as to facilitate the
wellsite arrangement.
[0010] The present invention will be described in detail below with
reference to the accompanying drawings and specific
implementations.
BRIEF DESCRIPTION OF THE DRAWINGS
[0011] FIG. 1 is a schematic structural diagram of a five cylinder
plunger pump of the invention.
[0012] FIG. 2 is a schematic structural diagram of a power end
assembly.
[0013] FIG. 3 is a schematic structural diagram of a power end
housing.
[0014] FIG. 4 is a schematic structural diagram of a reduction
gearbox assembly.
[0015] FIG. 5 is a sectional view of a planetary reduction
gearbox.
[0016] FIG. 6 is a sectional view of a parallel reduction
gearbox.
[0017] FIG. 7 is a schematic structural diagram of a
crankshaft.
[0018] FIG. 8 is a schematic structural diagram of the connection
between the connecting rod assembly and the crosshead assembly.
[0019] Wherein, 1. power end assembly, 2. reduction gearbox
assembly, 3. hydraulic end assembly, 4. driving flange, 5. power
end housing, 6. crankshaft, 7. bearing, 8. connecting rod bearing
bush, 9. connecting rod body, 10. slide rail, 11. crosshead, 12.
crosshead bearing bush, 13. pull rod, 14. spacer frame, 15. long
screw, 16. nut, 17. clamp, 18. plunger, 19. valve housing, 20.
crankshaft support, 21. crosshead support, 22. hydraulic support,
23. back cover plate, 24. vertical plate, 25. bearing seat, 26.
base plate, 27. support plate, 28. front end plate, 29. upper cover
plate, 30. parallel reduction gearbox, 31. planetary reduction
gearbox, 32. internal gear, 33. planetary gear, 34. sun gear, 35.
planetary carrier, 36. bull gear, 37. pinion, 38. spline, 39.
connecting rod cap, 40. connecting rod bolt, 41. crosshead gland,
42. guide plate, 43. screw.
DESCRIPTION OF THE EMBODIMENTS
[0020] As shown in FIGS. 1 to 8, a five cylinder plunger pump with
an integral power end structure, including a power end assembly 1,
a hydraulic end assembly 3 and a reduction gearbox assembly 2,
wherein one end of the power end assembly 1 is connected to the
hydraulic end assembly 3, and the other end of the the power end
assembly 1 is connected to the reduction gearbox assembly 2; the
power end assembly 1 includes a crankcase, a crosshead case and a
spacer frame 14, the crankcase and the crosshead case are
integrally welded to constitute a power end housing 5 which is
connected to the spacer frame 14, the power end housing 5 includes
a vertical plate 24, a bearing seat 25, a front end plate 28, a
back cover plate 23, a base plate 26, a support plate 27 and an
upper cover plate 29; there are six vertical plates 24 and six
bearing seats 25, each vertical plate 24 is connected to a
corresponding bearing seat 25, and the six vertical plates 24 are
arranged in parallel to constitute a power end chamber; the base
plate 26 is mounted at the bottom of the power end chamber, the
upper cover plate 29 is mounted on the top of the power end
chamber, the front end plate 28 is mounted at the front end of the
power end chamber, the back cover plate 23 is mounted at the back
end of the power end chamber, and the support plate 27 is disposed
between two adjacent vertical plates 24 arranged in parallel. In
the power end assembly 1 of the five cylinder plunger pump, the
crankcase and the crosshead case are integrally welded so that the
power end assembly 1 has a higher structural strength and a better
support stability, thus effectively decreasing the bearing
deformation of the power end housing 5, reducing the vibration of
the whole pump, and improving the running stability of the five
cylinder plunger pump.
[0021] A crankshaft support 20 is disposed at the bottom of the
crankcase, and the crankshaft support 20 is used to support the
crankcase. A crosshead support 21 is disposed at the bottom of the
crosshead case, and the crosshead support 21 is used to support the
crosshead case. A hydraulic support 22 is disposed at the bottom of
the spacer frame 14, and the hydraulic support 22 is used to
support the hydraulic end assembly 3. The five cylinder plunger
pump adopts a multi-point support design to enhance the support
strength of the five cylinder plunger pump and reduce the
vibration, thus better ensuring high load operation and more
smoothly running.
[0022] The crankcase is provided with a crankshaft 6 and a bearing
7. The crankshaft 6 is integrally forged from alloy steel and
includes six axle journals and five bellcranks, and one bellcrank
is disposed between every two adjacent axle journals. The cylinder
spacing of the five cylinder plunger pump is 13-14 inches. A design
of increased cylinder spacing is beneficial to increase the contact
areas between the crankshaft 6 and the connecting rod bearing bush
8, the crosshead 11 and the slide rail 10, and enhance the support
strength, thus ensuring the high power output of the five cylinder
plunger pump. The high-power five cylinder plunger pump can
effectively solve the problems of narrow shale gas fracturing
wellsite area and requirement for multiple fracturing equipment,
and reduce the use of equipment so as to facilitate the wellsite
arrangement. There are six bearings 7 mounted on the six axle
journals, meanwhile the outer rings of bearings 7 are mounted on
the six bearing seats 25 in the power end housing 5 so as to
rotationally move within the bearing seats 25.
[0023] A spline 38 is provided within the crankshaft 6. The
reduction gearbox assembly 2 is connected to the power end housing
5 through bolts and provided with an external spline which is
connected to the spline 38 for power output. The installation angle
of the reduction gearbox assembly 2 can be adjusted according to
input requirements. A driving flange 4 is provided outside the
reduction gearbox assembly 2, through which the power source is
connected for power input.
[0024] A crosshead assembly is provided within the crosshead case,
a connecting rod assembly is provided between the crankcase and the
crosshead case, and a crankshaft 6 is provided within the
crankcase. One end of the connecting rod assembly is connected to
the crankshaft 6 through a connecting rod bearing bush 8, the other
end of the connecting rod assembly is connected to the crosshead
assembly through a crosshead bearing bush 12 allowing for
reciprocating oscillation, and the other end of the crosshead
assembly is connected to the pull rod 13. The pull rod 13 has a
hollow structure. The connecting rod bearing bush 8 and the
crosshead bearing bush 12 are both alloy coated steel backing
bearing bushes, with a large width-diameter ratio and a high
support strength.
[0025] There are two slide rails 10 fixed on the support plate 27
within the power end housing 5, the two slide rails 10 form a
semi-circular space, in which a crosshead 11 is mounted for
reciprocating linear motion.
[0026] The crosshead assembly is designed as a split structure,
including a crosshead gland 41 and a crosshead 11, which are
connected to each other to facilitate assembly with and disassembly
from the connecting rod assembly.
[0027] The connecting rod assembly includes a connecting rod cap 39
and a connecting rod body 9, which are formed by integral forging
and then cuffed, with high strength. The connecting rod cap 39 and
the connecting rod body 9 are connected to each other through
bolts, specifically, one end of the connecting rod body 9 is
connected to the bellcrank through the connecting rod cap 39, the
connecting rod bolt 40 and the connecting rod bearing bush 8, and
the other end of the connecting rod body 9 is connected to the
crosshead 11 through the crosshead gland 41 and the crosshead
bearing bush 12. Two guide plates 42 are respectively fixed at the
upper and the lower ends of the crosshead 11 through screws 43. The
guide plates 42 are made of copper alloy, they contact with the
slide rails 10 directly and move relative to each other.
[0028] The crankshaft 6, the connecting rod body 9, and the
crosshead 11 are all provided with a lubricating oil circuit for
lubrication of the bearing 7, the connecting rod bearing bush 8,
and the crosshead bearing bush 12.
[0029] The hydraulic end assembly 3 includes a valve housing 19, a
plunger 18, and a clamp 17 and so on. The hydraulic end assembly 3
connects the plunger 18 to the pull rod 13 through the clamp 17,
and fixes them on the spacer frame 14 with a long screw 15 and a
nut 16, and the long screw 15 is threaded to the power end housing
5.
[0030] The stroke of the five cylinder plunger pump with an
integral power end structure is 11 inches. The design of long
stroke is very suitable for the current demands for shale gas
fracturing chain operation, decreasing the number of equipment in
the wellsite, and improving operational efficiency and economy.
[0031] The reduction gearbox assembly 2 includes a planetary
reduction gearbox 31 and a parallel reduction gearbox 30. One end
of the planetary reduction gearbox 31 is connected to the power end
assembly 1, the other end of the planetary reduction gearbox 31 is
connected to the parallel reduction gearbox 30. The planetary
reduction gearbox 31 and the parallel reduction gearbox 30 help to
achieve two-stage reduction of the reduction gearbox assembly 2,
with a reduction ratio of 8:1-15:1. The parallel reduction gearbox
30 includes a bull gear 36 and a pinion 37, which is used for
primary reduction; the planetary reduction gearbox 31 includes an
internal gear 32, four planetary gears 33, a sun gear 34, and a
planetary carrier 35 to constitute a planetary gear mechanism,
which is used for secondary reduction. The sun gear 34 is located
at the center of the planetary gear mechanism, engaged with the
planetary gear 33, and coaxial with the bull gear 36 of the
parallel reduction gearbox 30. In running, an external power source
is connected through a driving flange 4 to drive the input shaft to
rotate, and the rotation is transferred to the bull gear 36 through
the pinion 37 to achieve primary reduction, then transferred to the
sun gear 34 through the bull gear 36, and then transferred to the
planetary gear 33 through the sun gear 34 to drive the planetary
carrier 35 to achieve secondary reduction, and finally the power is
transferred to the crankshaft 6 through the spline 38. A large
transmission ratio can be obtained by the two-stage transmission,
effectively decreasing the input torque and reducing the number of
strokes of the pump.
[0032] Operating principle: An external power or rotating speed is
transferred through the driving flange 4 to drive the reduction
gearbox assembly 2 to rotate. Power and torque are transferred to
the crankshaft 6 by the spline 38 through two-stage transmission.
The crankshaft 6 and the bearing 7 rotate within the power end
housing 5, driving the motion of the connecting rod body 9, the
crosshead 11 and the pull rod 13, and converting the rotational
motion of the crankshaft 6 into the reciprocating linear motion of
the pull rod 13. The pull rod 13 drives the plunger 18 through the
clamp 17 to move back and forth within the valve case 19, thus
realizing the low pressure liquid suction and high pressure liquid
discharge, i.e, realizing the pumping of liquid.
[0033] It will be appreciated to persons skilled in the art that
the present invention is not limited to the foregoing embodiments,
which together with the context described in the specification are
only used to illustrate the principle of the present invention.
Various changes and improvements may be made to the present
invention without departing from the spirit and scope of the
present invention. All these changes and improvements shall fall
within the protection scope of the present invention. The
protection scope of the present invention is defined by the
appended claims and equivalents thereof.
* * * * *