CN105937557A - Power input connection device of fracturing pump - Google Patents

Abstract

The invention discloses a fracturing pump power input connecting device, which comprises a transition connecting plate, the inner circumference of the transition connecting plate is slidably fitted on the input shaft of the fracturing pump gear box, and the outer circumference of the transition connecting plate is slidably fitted with a connecting flange Ⅱ, connecting flange II is fixedly connected with the end flange on one side of coupling I, the end flange on the other side of coupling I is fixedly connected with the end flange on one side of coupling II, and the other end flange of coupling II is fixedly connected The end flange on the side is fixedly connected with the shaft end flange of the gearbox output shaft. The device of the invention ensures correct and reliable installation, is convenient for installation and disassembly, has a compact structure, and can reduce the installation distance between the input shaft of the fracturing pump and the gearbox.

Description

A fracturing pump power input connection device

technical field

The invention belongs to the technical field of petroleum, coal bed gas and shale gas equipment, and relates to a power input connection device for a fracturing pump.

Background technique

The fracturing pump is the core supporting unit of the fracturing vehicle. Its input end and the gearbox are connected to power through the drive shaft. Since the fracturing pump and the gearbox are fixed and installed on the transport chassis through separate supports, in order to ensure their respective It is convenient to disassemble and maintain, and the transmission shaft must adopt a retractable structure, so that the transmission shaft needs to ensure a certain length.

In recent years, fracturing vehicles have shown a trend of high power, long working hours and high pressure, and the power, quality and overall dimensions of the installed engines, gearboxes and fracturing pumps are also increasing. Restricted by roads in mountainous and hilly oilfields in my country, the fracturing vehicle must control the length of the vehicle to ensure its road passability; while the size of the engine, gearbox and fracturing pump is fixed, according to the traditional fracturing pump and gearbox through the retractable drive shaft The way of connection, because the transmission shaft needs to ensure a certain length, the fracturing pump will not be installed on the transport chassis of conventional length.

Contents of the invention

The purpose of the present invention is to provide a fracturing pump power input connection device, which solves the problem in the prior art that the supporting fracturing pump of a large fracturing vehicle cannot be installed on a transport chassis vehicle of a conventional length, and reduces the cost of the entire fracturing vehicle. The length, the road passability is good.

The technical solution adopted by the present invention is a power input connection device for a fracturing pump, including a transition connection plate, the inner circumference of the transition connection plate is slidably fitted on the input shaft of the fracturing pump gearbox, and the outer circumference of the transition connection plate slides The set is equipped with a connecting flange II, which is fixedly connected to the end flange on one side of the coupling I, and the end flange on the other side of the coupling I is fixedly connected to the end flange on the side of the coupling II. The end flange on the other side of the shaft device II is fixedly connected with the shaft end flange of the transmission output shaft.

The power input connection device of the fracturing pump of the present invention is also characterized in that:

The outer circumference of the input shaft of the fracturing pump gearbox is provided with external splines I, the inner circumference of the transition connection plate is provided with internal splines I, the outer circumference of the transition connection plate is provided with external splines II, and the inner circumference of the connecting flange II is provided with inner splines. Spline II; the internal spline I on the transition connection plate is matched with the external spline I on the input shaft of the fracturing pump gearbox, and the external spline II on the transition connection plate is connected to the internal spline on the inner circle of the flange II Ⅱ Matching connection.

Connecting flange II The end face of the flange is provided with a seam A, the coupling I is a cross shaft universal joint structure, and the two ends are respectively provided with a seam B and a seam C; the coupling II is also a cross shaft universal joint structure , the two ends are respectively provided with notch D and notch E; the shaft end flange of the output shaft of the gearbox is provided with notch F; the notch A on the end face of connecting flange II is connected with the notch A on the end face of the flange at one end of coupling I B fits the socket; the seam C on the flange end face of the other end of the coupling I is matched with the seam D on the flange end face of the coupling II; the seam E on the flange end face of the other end of the coupling II is connected to the variable speed The seam F of the shaft end flange of the output shaft of the box is fitted with a socket.

Connect the end face of flange II and the flange at one end of coupling I, the flange at the other end of coupling I and the flange at one end of coupling II, the flange at the other end of coupling II and the flange at the end of the gearbox output shaft, respectively The connection is fixed by a circle of connecting bolt II and its matching nut.

The end face of the input shaft of the fracturing pump gear box is connected with a pressing plate through a connecting bolt 1, and a threaded through hole is additionally arranged in the middle of the pressing plate.

The beneficial effect of the present invention is that the transitional connection plate and the input shaft of the fracturing pump are provided with pressure plates for axial positioning, and the connecting end faces of each flange are provided with notches for radial positioning, which ensures the correctness and reliability of installation; the connecting flange II and the The internal and external spline connection of the transition connection plate, the connection flange II can move axially, which is convenient for installation and disassembly, and has a compact structure, which can reduce the installation distance between the input shaft of the fracturing pump and the gearbox.

Description of drawings

Fig. 1 is a structural schematic diagram of an existing fracturing pump power input connection device;

Fig. 2 is a schematic structural view of the device of the present invention in an extended state;

Fig. 3 is a schematic structural view of the device of the present invention in a contracted state;

Fig. 4 is a schematic diagram of the position of the device of the present invention at different installation lengths.

In the figure, 1. Connecting flange I, 2. Transition connecting plate, 3. Connecting flange II, 4. Pressure plate, 5. Transmission shaft, 6. Coupling I, 7. Coupling II, 8. Connecting bolts I, 9. Connecting bolt Ⅱ, 10. Nut, 11. Input shaft of fracturing pump gearbox, 12. Output shaft of gearbox, 13. Threaded through hole.

detailed description

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Referring to Fig. 1, the structure of the prior art is that a connecting flange I1 is set on the input shaft 11 of the fracturing pump gearbox, and the connecting flange I1 and the flange at one end of the drive shaft 5 pass through a circle of connecting bolts II9 and its matching The nut 10 is fixedly connected, and the flange at the other end of the transmission shaft 5 is fixedly connected with the gearbox output shaft 12 shaft end flange through another ring of connecting bolt II9 and its matching nut 10; on the end face of the input shaft 11 of the fracturing pump gearbox A pressure plate 4 is fixedly installed towards the transmission shaft 5 through a circle of connecting bolts I8.

In the power input connection structure of the fracturing pump in the prior art, the connecting flange I1 is connected with the input shaft 11 of the fracturing pump gearbox through internal and external splines, and is also connected with the flange at one end of the transmission shaft 5 through the connecting bolt II9 and the nut 10. And through the pressure plate and the connecting bolt 1, it is connected and compressed with the input shaft 11 of the fracturing pump gearbox to achieve the purpose of axial positioning and fixing; since both the fracturing pump and the gearbox are fixedly connected with the chassis transport vehicle, in order to facilitate installation and disassembly, the transmission The shaft 5 needs to adopt a telescopic structure; the flange at the other end of the transmission shaft 5 and the flange at the input end of the gearbox are connected by bolts Ⅱ9 and nuts 10 . When working, the gearbox outputs power, which drives the power input connection device to drive the fracturing pump to work. Since the telescopic structure of the transmission shaft 5 is located in the middle of the transmission shaft, the distance between the two mounting flange surfaces of the structure is relatively long.

Referring to Fig. 2 and Fig. 3, the structure of the device of the present invention includes a transition connecting plate 2, the inner circumference of the transition connecting plate 2 is slidably fitted on the input shaft 11 of the fracturing pump gearbox, and the outer circumference of the transition connecting plate 2 is slidably fitted There is a connecting flange Ⅱ3, the connecting flange Ⅱ3 is fixedly connected with the end flange on one side of the coupling I6, and the end flange on the other side of the coupling I6 is fixedly connected with the end flange on the side of the coupling Ⅱ7. The end flange on the other side of the device II7 is fixedly connected to the shaft end flange of the transmission output shaft 12;

The outer circumference of the input shaft 11 of the fracturing pump gearbox is provided with external splines I, the inner circumference of the transition connection plate 2 is provided with internal splines I, the outer circumference of the transition connection plate 2 is provided with external splines II, and the inner circumference of the connecting flange II3 Internal spline II is provided; the internal spline I on the transition connection plate 2 is matched with the external spline I on the input shaft 11 of the fracturing pump gearbox, and the external spline II on the transition connection plate 2 is connected to the connecting flange II3 The inner spline II of the inner circle is matched with the connection;

The end face of the connecting flange II3 is provided with a seam A (convex), the coupling I6 is a cross shaft universal joint structure, and the two ends are respectively provided with a seam B (concave) and a seam C (convex); Coupling Ⅱ7 is also a cross shaft universal joint structure, and the two ends are respectively provided with notch D (inner concave) and notch E (inner concave); the shaft end flange of the transmission output shaft 12 is provided with notch F ( protruding); the seam A on the end face of the connecting flange II3 is matched with the seam B on the end face of the flange at one end of the coupling I6 for radial positioning; the seam C on the flange end face at the other end of the coupling I6 is in contact with the joint The seam D on the end face of the flange at one end of the shaft coupling Ⅱ7 cooperates with the socket for radial positioning; the seam E on the flange end face at the other end of the coupling II7 cooperates with the seam F on the flange end of the transmission output shaft 12 , for radial positioning;

The end face of connecting flange Ⅱ3 and the flange at one end of the coupling I6, the flange at the other end of the coupling I6 and the flange at one end of the coupling Ⅱ7, the flange at the other end of the coupling Ⅱ7 and the flange at the end of the transmission output shaft 12, Each is fixedly connected by a circle of connecting bolt Ⅱ9 and its matching nut 10;

The end face of the input shaft 11 of the fracturing pump gear box is connected with a pressure plate 4 through a connecting bolt I8, which is used to compress and fix the transition connection plate 2 to realize the axial positioning of the transition connection plate 2; Holes 13 for easy installation and removal.

The input shaft 11 of the fracturing pump gearbox and the coupling I6 are connected through the two-stage spline of the transition connecting plate 2 and the connecting flange II3, which is convenient for adjusting the distance between the input shaft 11 of the fracturing pump gearbox and the coupling I6. The total transmission length is positioned and fixed between each flange through a double connection method of socket socket and bolt.

The working principle of the present invention is,

Referring to Fig. 2 and Fig. 3, the transition connection plate 2 is axially positioned and fixed by the pressure plate 4, and is connected with the connection flange II3 through a spline, and the connection flange II3 can move along the axis direction to realize the installation of the fracturing pump power input connection device The length can be adjusted as needed;

Referring to Figure 4, when the coupling I6 and the coupling II7 move to the leftmost extreme position of the transition connection plate 2 along with the connecting flange II3, the input connection device has the shortest installation length; when the coupling I6 and the coupling When the device II7 moves to the rightmost extreme position of the transition connection plate 2 along with the connecting flange II3, the input connection device has the longest installation length.

The device of the present invention has high installation accuracy and reliability, compact structure, can reduce the installation distance between the input shaft 11 of the fracturing pump gearbox and the output shaft 12 of the gearbox, reduces the overall length of the fracturing vehicle, and improves road traffic. sex.

Claims (5)

1. a fracturing pump power input attachment means, it is characterised in that: include transition connecting disc (2), The inner periphery slip cap of transition connecting disc (2) is contained on fracturing pump gearbox input shaft (11), transition On the excircle of connection dish (2), slip cap is equipped with adpting flange II (3), adpting flange II (3) and connection Axial organ I (6) side end flanges is fixing to be connected, the end flanges of shaft coupling I (6) opposite side and shaft coupling The end flanges of device II (7) side is fixing to be connected, the end flanges of shaft coupling II (7) opposite side and change The boss of speed case output shaft (12) is fixing to be connected.

Fracturing pump power the most according to claim 1 input attachment means, it is characterised in that: described Fracturing pump gearbox input shaft (11) excircle on be provided with external splines I, in transition connecting disc (2) Circumference is provided with internal spline I, and transition connecting disc (2) excircle is provided with external splines II, adpting flange II (3) inner periphery is provided with internal spline II；Internal spline I on transition connecting disc (2) and fracturing pump gear The supporting connection of external splines I on case power shaft (11), the external splines II on transition connecting disc (2) and company The supporting connection of internal spline II of acting flange II (3) inner circle.

Fracturing pump power the most according to claim 1 input attachment means, it is characterised in that: described Adpting flange II (3) end face of flange to be provided with seam A, shaft coupling I (6) be Hooke's joint Structure, both ends of the surface are respectively arranged with seam B and seam C；Shaft coupling II (7) is similarly cross axle ten thousand To nodule structure, both ends of the surface are respectively arranged with seam D and seam E；The axle head of output shaft of gear-box (12) Flange is provided with seam F；

The seam B of seam A and shaft coupling I (6) the end flange end face of adpting flange II (3) end face Coordinate socket；The seam C of shaft coupling I (6) other end end face of flange and shaft coupling II (7) hold-carrying The seam D of blue end face coordinates socket；The seam E of shaft coupling II (7) other end end face of flange and change The seam F of speed case output shaft (12) boss coordinates socket.

Fracturing pump power the most according to claim 1 input attachment means, it is characterised in that: described Adpting flange II (3) end face and shaft coupling I (6) end flange, shaft coupling I (6) another hold-carrying Orchid and shaft coupling II (7) end flange, shaft coupling II (7) other end flange and output shaft of gear-box (12) boss, solid each via a circle connecting bolt II (9) and supporting nut (10) thereof Fixed connection.

Fracturing pump power the most according to claim 1 input attachment means, it is characterised in that: described Fracturing pump gearbox input shaft (11) end face by connecting bolt I (8) connect have pressing plate (4), It is additionally provided with tapped through hole (13) in the middle of pressing plate (4).