An opposed reciprocating pump

Abstract

The present invention relates to an opposed reciprocating pump. The opposed reciprocating pump includes a housing and hydraulic ends arranged in pairs on the left and right sides of the housing, and a reciprocating drive mechanism is mounted on the housing; the reciprocating drive mechanism includes a guiding mounting seat that is guided and movably assembled on the housing in the left-right direction, and the guiding mounting seat is connected to the hydraulic end; the opposed reciprocating pump further includes a first thrust shaft, a second thrust shaft and a swinging member. At least two second thrust shafts are arranged at intervals in the up-down direction, and the second thrust shafts are rotatably assembled on the guiding mounting seat around their own axes; the swinging member is arranged between the first thrust shaft and the second thrust shafts in the left-right direction. One end of the swinging member has an inner arc surface that presses against the first thrust shaft, and the other end of the swinging member has an outer arc surface, and the second thrust shafts are arranged at intervals along the extending direction of the outer arc surface. The opposed reciprocating pump further includes an eccentric rotation mechanism that drives the swinging member to reciprocate swing.

Description

Technical Field

[0001] The invention relates to an opposed reciprocating pump. Background Art

[0002] The opposed reciprocating pump has the advantages of high pressure and large flow rate, and is widely used in various processes of oilfield production technology, and is an indispensable equipment for oilfield production technology. As shown in the Chinese invention patent application with application publication number CN104728080A, the existing opposed reciprocating pump discloses a driving device of a reciprocating pump or compressor and a large thrust opposed reciprocating pump. The opposed reciprocating pump includes a reciprocating drive mechanism (i.e., the driving device in the patent) and hydraulic ends arranged in pairs on both sides of the reciprocating drive mechanism. The reciprocating drive mechanism is connected to the hydraulic end through a piston rod to drive the hydraulic end to do work. The reciprocating drive mechanism includes an upper guide plate and a lower guide plate arranged at intervals up and down. A passive slider is installed between the upper and lower guide plates for horizontal sliding. An active slider accommodating groove is provided in the passive slider, and an active slider is installed in the active slider accommodating groove for vertical sliding. The reciprocating drive mechanism also includes an eccentric rotating mechanism, which pushes the active slider to slide vertically and pushes the passive slider to slide horizontally and reciprocatingly at the same time, and pushes the piston rod to move back and forth through the sliding of the passive slider.

[0003] The existing problem of the opposed reciprocating pump is that when in use, there is planar sliding friction between the active slider and the passive slider, and between the passive slider and the guide plate, which results in large friction, large energy consumption, and large wear on the active slider and the passive slider. Summary of the invention

[0004] The object of the present invention is to provide an opposed reciprocating pump to solve the technical problem in the prior art that the friction force of the reciprocating drive mechanism during movement is large, resulting in large energy consumption.

[0005] To achieve the above object, the technical solution of the opposed reciprocating pump provided by the present invention is: an opposed reciprocating pump, comprising: a housing and hydraulic ends arranged in pairs on the left and right sides of the housing, a reciprocating drive mechanism is installed on the housing, and the reciprocating drive mechanism is used to drive the piston in the hydraulic end to move back and forth left and right;

[0006] The reciprocating drive mechanism includes:

[0007] The guide mounting seat is assembled on the housing along the left and right directions, and the guide mounting seat is connected to the hydraulic end;

[0008] The first thrust shaft and the second thrust shaft are respectively disposed on the left and right sides of the guide mounting seat along the left-right direction, the axes of the first thrust shaft and the second thrust shaft are parallel to each other, and the extending direction of the axes is defined as the front-back direction, and the direction perpendicular to both the left-right direction and the front-back direction is defined as the up-down direction, at least two second thrust shafts are arranged at intervals along the up-down direction, and the second thrust shafts are rotatably mounted on the guide mounting seat around their own axes;

[0009] A swinging member is arranged between the first thrust shaft and the second thrust shaft in the left-right direction, one end of the swinging member has an inner arc surface, the inner arc surface is used to fit and press on the first thrust shaft, the other end of the swinging member has an outer arc surface, each second thrust shaft is arranged at intervals along the extension direction of the outer arc surface, the outer arc surface is used to roll with each second thrust shaft, so that the swinging member can swing back and forth around the axis of the first thrust shaft;

[0010] An eccentric rotating mechanism having an input shaft for connecting to a power source, and an output shaft arranged eccentrically with the input shaft;

[0011] The swing member is provided with an output shaft through hole, which is located between the inner arc surface and the outer arc surface. The output shaft of the eccentric rotating mechanism penetrates into the output shaft through hole to drive the swing member to swing back and forth.

[0012] Beneficial effect: The second push shaft is rotatably assembled on the guide mounting seat. When the eccentric rotating mechanism drives the swing member to swing back and forth, the outer arc surface of the swing member and the second push shaft are in rolling contact. Compared with the plane sliding friction method in the prior art, the friction force is smaller and the energy consumption is smaller. In addition, during the reciprocating swinging process, the swing member relies on the press fit between the outer arc surface and the second push shaft, and the press fit between the inner arc surface and the first push shaft to push the guide mounting seat back and forth. There is only thrust in the entire movement process. Since the compressive stress of the material is usually greater than the tensile stress, compared with the method of hingedly connecting one end of the swing member to the guide mounting seat to push and pull the guide mounting seat, the service life is longer, and the situation of increased wear due to the force on the hinged end of the swing member is avoided.

[0013] Preferably, a bearing bush is provided outside the first thrust shaft, and the inner arc surface of the swing member presses on the bearing bush. The inner arc surface presses on the first thrust shaft through the bearing bush, and the bearing bush and the first thrust shaft rotate relative to each other, further reducing friction.

[0014] Preferably, the first thrust shaft is rotatably mounted on the guide mounting seat around its own axis.

[0015] Preferably, the swing member comprises a swing plate having the outer arc surface and a connecting rod having the inner arc surface, and the cross-sectional area of ​​the connecting rod is smaller than the cross-sectional area of ​​the swing plate. The cross-sectional area of ​​the connecting rod is smaller than the cross-sectional area of ​​the swing plate, which can further reduce the weight of the swing member and reduce energy consumption.

[0016] Preferably, the guide mounting seat comprises two mounting seats arranged at intervals in the left-right direction, and also comprises a fixing rod fixedly connecting the two mounting seats, and the two mounting seats and the fixing rod cooperate to form a frame-type guide mounting seat. The guide mounting seat is a frame-type structure, which further reduces the weight of the guide mounting seat and reduces energy consumption.

[0017] Preferably, the fixing rods are arranged in a rectangular shape and are provided with avoidance grooves for avoiding the swinging of the swing plate. After the avoidance grooves are provided, the distance between the fixing rods can be further reduced, and correspondingly, the size of the mounting seat can be further reduced, thereby further reducing weight.

[0018] Preferably, the eccentric drive mechanism is a crankshaft, which comprises a main journal and an eccentrically arranged connecting rod journal, the connecting rod journal forming the output shaft, and the connecting rod journal penetrates into the swinging member.

[0019] Preferably, there are at least two groups of swing members, and the swing members are arranged at intervals along the front-to-back direction;

[0020] The connecting rod journals correspond to the swinging members one by one;

[0021] A crankshaft mounting seat is arranged in the shell, and the crankshaft mounting seat is used to support the main journal between two adjacent connecting rod journals.

[0022] Preferably, connecting rods are fixed to the left and right ends of the guide mounting seat, respectively, and the connecting rods are guide-mounted on the shell so that the guide mounting seat is guide-mounted on the shell;

[0023] The connecting rod is connected to the hydraulic end. The guide mounting seat is assembled on the housing through the guide of the connecting rod, and the structure is simpler than the overall installation of the guide mounting seat.

[0024] Preferably, the guide mounting seat is provided with two ear plates spaced apart from each other in the upper and lower directions corresponding to the first thrust shaft and each second thrust shaft, and the corresponding end of the swing member is limitedly arranged between the corresponding two ear plates in the front-back direction. The swing member is limitedly arranged between the corresponding two ear plates, which can prevent the corresponding end of the swing member from shaking or moving in the front-back direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of an opposed reciprocating pump embodiment 1 provided by the present invention;

[0026] Figure 2 for Figure 1 A top view of

[0027] Figure 3 for Figure 1 and Figure 2 Schematic diagram of the crankshaft;

[0028] Figure 4 for Figure 1 and Figure 2 Schematic diagram of the swinging member;

[0029] Figure 5 This is a first schematic diagram of the guide mounting seat and the connecting rod in Example 1 of the opposed reciprocating pump provided by the present invention;

[0030] Figure 6 This is a second schematic diagram of the guide mounting seat and the connecting rod in Example 1 of the opposed reciprocating pump provided by the present invention;

[0031] Figure 7 It is a schematic diagram of the casing in Example 1 of the opposed reciprocating pump provided by the present invention;

[0032] Figure 8 It is a schematic diagram of various motion states of the guide mounting seat and the swing member in the opposed reciprocating pump embodiment 1 provided by the present invention when in use;

[0033] Description of reference numerals:

[0034] 1. Hydraulic end; 2. Piston rod; 3. Reciprocating drive mechanism; 4. Housing; 5. Guide mounting seat; 6. First mounting seat; 7. Second mounting seat; 8. Fixed rod; 9. Connecting rod; 10. Swinging member; 101. Swinging plate; 102. Connecting rod; 103. Outer arc surface; 104. Inner arc surface; 105. Connecting rod journal mounting hole; 106. Weight reduction hole; 11. Crankshaft; 111. Input shaft; 112. Main journal; 113. Connecting rod journal; 12. First rotating shaft; 13. Second rotating shaft; 14. Bearing seat; 15. Avoidance groove; 16. First ear plate; 17. Second ear plate; 18. Bearing shell; 19. Crankshaft placement hole; 20. Guide hole; 21. Crankshaft mounting seat; 22. Bearing mounting hole; 23. Heat dissipation hole. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the embodiments described are only part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0037] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprises a..." do not exclude the process or method that includes the elements.

[0038] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" that may appear should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "provided with" that may appear should be understood in a broad sense. For example, the object "provided with" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or an inseparable connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] The present invention is further described in detail below in conjunction with embodiments.

[0041] Specific embodiment 1 of the opposed reciprocating pump provided by the present invention:

[0042] like Figures 1 to 8As shown, the opposed reciprocating pump includes a hydraulic end 1, a piston in the hydraulic end 1, and a housing 4. The housing 4 is fixedly arranged when in use, and the hydraulic ends 1 are arranged in pairs on both sides of the housing 4. A reciprocating drive mechanism 3 is installed on the housing 4. The reciprocating drive mechanism 3 drives the piston in the hydraulic end 1 to move back and forth. The reciprocating drive mechanism 3 and the hydraulic end 1 are connected through a piston rod 2. Figure 2 As shown, there are three fluid ends 1 on each side.

[0043] For the convenience of description, it is defined that the two pairs of hydraulic ends 1 are arranged at intervals along the left-right direction, and the pistons in the hydraulic ends 1 reciprocate along the left-right direction. The structure of the reciprocating drive mechanism 3 is as follows: Figure 1 and Figure 2 As shown, the reciprocating drive mechanism 3 includes a guide mounting seat 5, which is installed on the housing 4 along the left-right direction. There are three guide mounting seats 5, which are arranged at intervals along the front-to-back direction, and the front-to-back direction is perpendicular to the left-to-right direction. Three connecting rods 9 are fixedly installed at the left and right ends of the guide mounting seat 5, and the three connecting rods 9 at each end are respectively connected to the piston rod 2 corresponding to the hydraulic end 1 on the same side. The connecting rod 9 and the piston rod 2 can be connected by bolts, couplings, etc. Figure 7 As shown, a guide hole 20 is opened on the side wall of the housing 4 corresponding to each connecting rod 9 , and the connecting rod 9 passes through the guide hole 20 and cooperates with the guide hole 20 to limit the left and right movement of the guide mounting seat 5 .

[0044] The structure of the guide mounting seat 5 is as follows: Figure 5 and Figure 6 As shown, the guide mounting seat 5 includes a first mounting seat 6 and a second mounting seat 7 arranged in sequence along the left-right direction. The first mounting seat 6 and the second mounting seat 7 are both rectangular as a whole, with the thickness direction being the left-right direction, the width direction being the front-back direction, and the length direction being the up-down direction. The connecting rod 9 is fixedly mounted on the side opposite to the first mounting seat 6 and the second mounting seat 7. The guide mounting seat 5 also includes four fixing rods 8 connecting the first mounting seat 6 and the second mounting seat 7. The four fixing rods 8 are arranged in a rectangular shape and are respectively located at the four corners of the first mounting seat 6 and the second mounting seat 7. The fixing rods 8 and the first mounting seat 6 and the second mounting seat 7 can be installed by interference fit or by threaded assembly. After being connected by the four fixing rods 8, the guide mounting seat 5 forms a frame-type mounting seat.

[0045] Two first ear plates 16 are protrudingly provided on the inner side of the second mounting seat 7 facing the first mounting seat 6. The two first ear plates 16 are spaced apart in the front-to-back direction. The first rotating shaft 12 is passed through the two first ear plates 16. The axis of the first rotating shaft 12 extends in the front-to-back direction. The first rotating shaft 12 is rotatably installed in the first ear plates 16 by bearings or bushings. The first rotating shaft 12 can rotate around its own axis.

[0046] Two groups of second ear plates 17 are protrudingly provided on the inner side of the first mounting seat 6 facing the second mounting seat 7. The two groups of second ear plates 17 are arranged at intervals in the up-down direction, and the first ear plate 16 is located in the middle of the two groups of second ear plates 17 in the up-down direction. Each group of second ear plates 17 includes two second ear plates 17 arranged at intervals in the front-back direction, and a second rotating shaft 13 is installed in each group of second ear plates 17. The second rotating shaft 13 is rotatably installed in the second ear plate 17 through a bearing or a sleeve, and the second rotating shaft 13 can rotate around its own axis.

[0047] like Figure 1 and Figure 2 As shown, the reciprocating drive mechanism further includes a swing member 10 located in the guide mounting seat 5. The structure of the swing member 10 is as shown in FIG. Figure 4 As shown, the swing member 10 includes a swing plate 101, which is a plate body, and also includes a connecting rod 102 connected to the swing plate 101, and the overall cross-sectional size of the connecting rod 102 is smaller than the overall cross-sectional size of the swing plate 101. The swing plate 101 and the connecting rod 102 are arranged left and right when in use, and the connecting rod 102 cooperates with the first rotating shaft 12 when in use, and the swing plate 101 cooperates with the second rotating shaft 13 when in use. There is an outer arc surface 103 at the end of the swing plate 101, and an inner arc surface 104 at the end of the connecting rod 102. The inner diameter size of the inner arc surface 104 is adapted to the outer diameter size of the first rotating shaft 12. The adaptation here refers to the fit between the inner arc surface 104 and the first rotating shaft 12, and sliding friction is performed when in use. A weight reduction hole 106 is opened on the connecting rod 102 to reduce the overall weight of the swing member 10. A connecting rod journal mounting hole 105 is provided on the swing plate 101 for the connecting rod journal 113 of the crankshaft 11 to pass through.

[0048] The structure after the swing member 10 is installed on the guide mounting seat 5 is as follows Figure 1 , Figure 2 and Figure 8 As shown, the inner arc surface 104 on the connecting rod 102 of the swing member 10 fits on the outer periphery of the first rotating shaft 12, and the outer arc surface 103 on the swing plate 101 of the swing member 10 is pressed together with the outer peripheries of the two second rotating shafts 13. Among them, the swing member 10 is located between the two first ear plates 16 and the two second ear plates 17 in the front-to-back direction to prevent the corresponding ends of the swing member 10 from swinging or moving too much in the front-to-back direction. When in use, when the crankshaft 11 drives the swing member 10 to move, the swing member 10 swings around the axis of the first rotating shaft 12, and the outer arc surface 103 cooperates with the second rotating shaft 13 to limit the position of the swing member 10. Figure 6 As shown, in order to further reduce the friction when the swinging member 10 swings, a bearing 18 is sleeved on the outside of the first rotating shaft 12. In specific use, the bearing 18 with a lubricating function can be selected to reduce the friction.

[0049] When the swing member 10 is in use, the end where the swing plate 101 is located has a larger swing amplitude. In order to avoid interference with the swing of the swing plate 101, Figure 5 As shown, an avoidance groove 15 is provided on the fixing rod 8 to avoid the swing plate 101 .

[0050] When assembling the swing member 10 and the guide mounting seat 5 , after the swing member 10 is placed in place, the rotating shaft is inserted into the first ear plate 16 and the second ear plate 17 .

[0051] Among them, the structure of the crankshaft 11 is as follows Figure 3 As shown, the crankshaft 11 adopts a structure that is already available on the market. The crankshaft 11 includes an input shaft 111, four main journals 112 coaxially arranged with the input shaft 111, and three connecting rod journals 113 eccentrically arranged. The connecting rod journal 113 penetrates into the connecting rod journal mounting hole 105. When the crankshaft 11 is controlled to rotate around the axis of the input shaft 111, the connecting rod journal 113 performs eccentric motion, driving the swing member 10 to swing back and forth.

[0052] To install the crankshaft 11 and the guide mounting seat 5, as Figure 7 As shown, two crankshaft mounting seats 21 are fixedly installed in the housing 4, and two crankshaft mounting seats 21 are arranged in the front-to-back direction. In the front-to-back direction, the space formed between the crankshaft mounting seat 21 and the housing 4 and between two adjacent crankshaft mounting seats 21 is used to install the guide mounting seat 5. A bearing mounting hole 22 that passes through the front and back is opened on the crankshaft mounting seat 21, and a crankshaft placement hole 19 that passes through the front and back is opened on the housing 4. The bearing mounting hole 22 and the crankshaft placement hole 19 correspond to each other front and back. A bearing seat 14 is installed at the crankshaft placement hole 19, and a rolling bearing is installed in the bearing seat 14 to support both ends of the crankshaft 11. A bearing is also placed in the bearing mounting hole 22 to support the main journal 112.

[0053] In order to dissipate heat in time, Figure 7 As shown, heat dissipation holes 23 are provided on the housing 4 , and the positions and numbers of the heat dissipation holes 23 can be changed according to actual needs.

[0054] When in use, the input shaft 111 of the crankshaft 11 is connected to the reducer, and the reducer drives the crankshaft 11 to rotate. The rotation of the crankshaft 11 drives the connecting rod journal 113 to rotate eccentrically around the axis of the main journal 112. The connecting rod journal 113 drives the swing member 10 to swing around the axis of the first rotating shaft 12. The inner arc surface 104 of the swing member 10 rotates relative to the first rotating shaft 12, and the outer arc surface 103 is in rolling contact with the second rotating shaft 13. The inner arc surface 104 and the outer arc surface 103 of the swing member 10 push the guide mounting seat 5 to perform linear reciprocating motion, thereby driving the piston rod 2 to reciprocate and perform work.

[0055] Specific usage process: Figure 8 As shown, Figure 8 ABCD in the figure represents the rotation position of the crankshaft 11, the dotted circle in the figure represents the input shaft 111 of the crankshaft 11, and the solid circle represents the connecting rod journal 113. Figure 8 In the middle A position, the connecting rod journal 113 is at the highest position, and the swing plate 101 of the swing member 10 also swings to the highest position driven by the connecting rod journal 113. At this time, the guide mounting seat 5 is in the middle position.

[0056] The crankshaft 11 rotates 90° counterclockwise to Figure 8 At the B station, the connecting rod journal 113 rotates to the leftmost end, and the swing member 10 swings to the horizontal position. The counterclockwise rotational motion of the swing member 10 can be decomposed into a downward sub-motion and a leftward sub-motion. The downward sub-motion is converted into the downward swinging of the swing member 10 around the first rotating shaft 12, and the leftward motion is converted into the inner arc surface 104 pushing the first rotating shaft 12 to the left, so that the guide mounting seat 5 moves to the left side to do work. At this time, the guide mounting seat 5 moves to the leftmost position.

[0057] The crankshaft 11 continues to rotate counterclockwise 90° to reach Figure 8 In the C position, the connecting rod journal 113 rotates to the lowest position, and the swing plate 101 of the swing member 10 swings to the lowest position driven by the connecting rod journal 113. The counterclockwise rotation movement of the swing member 10 around the first rotating shaft 12 can be decomposed into a downward sub-movement and a rightward sub-movement. The downward sub-movement is converted into the downward swinging of the swing member 10 around the first rotating shaft 12, and the rightward sub-movement is converted into the outer arc surface 103 pushing the second rotating shaft 13 to the right, so that the guide mounting seat 5 moves to the right to do work, and the guide mounting seat 5 returns to the middle position at this time.

[0058] The crankshaft 11 continues to rotate counterclockwise 90° to reach Figure 8 In the D station, the connecting rod journal 113 rotates to the rightmost end, and the swing member 10 swings to the horizontal position again. The movement of the swing member 10 around the first rotating shaft 12 is decomposed into an upward sub-movement and a rightward sub-movement. The upward sub-movement is converted into an upward swing of the swing member 10 around the first rotating shaft 12, and the rightward sub-movement is converted into the outer arc surface 103 pushing the second rotating shaft 13 to the right, so that the guide mounting seat 5 continues to move to the right to do work. At this time, the guide mounting seat 5 moves to the rightmost position.

[0059] The crankshaft 11 continues to rotate counterclockwise 90° and returns to Figure 8 In the process, the inner arc surface 104 pushes the first rotating shaft 12 to move the guide mounting seat 5 to Figure 8 Repeat the above process, the crankshaft 11 pushes the piston rod 2 to move back and forth through the swing member 10 and the guide mounting seat 5 to perform work.

[0060] The crankshaft 11 is an eccentric rotating mechanism capable of driving the swinging member 10 to swing back and forth, and the connecting rod journal 113 in the crankshaft 11 constitutes an output shaft that penetrates into the connecting rod journal mounting hole 105. The first rotating shaft 12 forms a first thrust shaft that is press-fitted with the inner arc surface 104 of the swinging member 10, and the second rotating shaft 13 forms a second thrust shaft that is press-fitted with the outer arc surface 103 of the swinging member 10. The connecting rod journal mounting hole 105 forms an output shaft through-hole for the output shaft of the eccentric rotating mechanism to penetrate.

[0061] Specific embodiment 2 of the opposed reciprocating pump of the present invention:

[0062] In Example 1, the connecting rods at the left and right ends of the guide mounting seat are guided and moved and assembled on the housing. In this embodiment, the guide mounting seat is directly guided and moved and assembled on the housing. In order to reduce friction, a rolling body such as a bearing or a ball can be arranged between the housing and the guide mounting seat. At this time, the connecting rod can still be retained, or the connecting rod can be cancelled, so that the piston rod is directly connected to the guide mounting seat.

[0063] Specific embodiment 3 of the opposed reciprocating pump of the present invention:

[0064] In Example 1, two guide mounting seats are arranged at intervals along the front-to-back direction. In this embodiment, the number of guide mounting seats can be increased or decreased according to actual conditions. When there is only one guide mounting seat, the crankshaft mounting seat is cancelled.

[0065] Specific embodiment 4 of the opposed reciprocating pump of the present invention:

[0066] In embodiment 1, the eccentric driving mechanism is a crankshaft. In this embodiment, when there is only one guide mounting seat, the eccentric driving mechanism can be a cam mechanism, and an output shaft is provided on the eccentric end of the cam mechanism, which penetrates into the output shaft through hole of the swing member.

[0067] Specific embodiment 5 of the opposed reciprocating pump of the present invention:

[0068] In the first embodiment, there are four fixed rods arranged in a rectangular shape, and there are avoidance grooves on the fixed rods. In this embodiment, the avoidance grooves are eliminated, and the spacing between the fixed rods is increased to ensure that there is no interference with the swing of the swing plate. In other embodiments, the number of fixed rods can be increased or decreased according to actual conditions.

[0069] Specific embodiment 6 of the opposed reciprocating pump of the present invention:

[0070] In embodiment 1, the guide mounting seat includes two mounting seats arranged at intervals on the left and right, and also includes a fixing rod connecting the two mounting seats. In this embodiment, the guide mounting seat can be an integrated structure, and the side plate connecting the two mounting seats is an integrated side plate.

[0071] Specific embodiment 7 of the opposed reciprocating pump of the present invention:

[0072] In embodiment 1, the swing member includes a swing plate and a connecting rod, and the cross-sectional area of ​​the swing plate is larger than the cross-sectional area of ​​the connecting rod. In this embodiment, the swing member is a swing plate as a whole, with an outer arc surface at one end and an inner arc surface at the other end.

[0073] Specific embodiment 8 of the opposed reciprocating pump of the present invention:

[0074] In Example 1, each push shaft has two ear plates, and the two ear plates limit the front and rear positions of the corresponding ends of the swing member. In this embodiment, the push shaft can be a single-end cantilever structure, and the swing member relies on an eccentric rotating mechanism to ensure the front and rear position limit.

[0075] Specific embodiment 9 of the opposed reciprocating pump of the present invention:

[0076] In embodiment 1, the first thrust shaft is assembled on the guide mounting seat so as to rotate around its own axis, and a bearing is provided on the outside of the first thrust shaft. In this embodiment, the bearing on the outside of the first thrust shaft is eliminated, so that the first thrust shaft is in direct contact with the inner arc surface on the swinging member. In other embodiments, the first thrust shaft is fixedly mounted on the guide mounting seat.

[0077] Specific embodiment 10 of the opposed reciprocating pump of the present invention:

[0078] In Embodiment 1, there are two second thrust shafts. In this embodiment, the number of second thrust shafts can be increased to three or more, and the second thrust shafts are arranged at intervals along the extension direction of the outer arc surface to limit the swing member and ensure that the swing member can swing back and forth around the first thrust shaft.

[0079] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An opposed reciprocating pump, comprising: a housing and hydraulic ends arranged in pairs on the left and right sides of the housing, a reciprocating drive mechanism is installed on the housing, and the reciprocating drive mechanism is used to drive the piston in the hydraulic end to reciprocate left and right; It is characterized in that: the reciprocating drive mechanism includes: a guiding mounting seat, which is guidingly movably assembled on the housing in the left-right direction, and the guiding mounting seat is connected to the hydraulic end; a first pushing shaft and a second pushing shaft, which are arranged on the left and right sides of the guiding mounting seat in the left-right direction, the axes of the first pushing shaft and the second pushing shaft are parallel to each other, and the extending direction of the axis is defined as the front-back direction, and the direction perpendicular to both the left-right direction and the front-back direction is defined as the up-down direction. There are at least two second pushing shafts arranged at intervals in the up-down direction, and the second pushing shafts are rotatably assembled on the guiding mounting seat around their own axes; a swinging member, which is located in the guiding mounting seat and is arranged between the first pushing shaft and the second pushing shaft in the left-right direction. One end of the swinging member has an inner arc surface, and the inner arc surface is used to adapt to press against the first pushing shaft. The other end of the swinging member has an outer arc surface, and each second pushing shaft is arranged at intervals along the extending direction of the outer arc surface. The outer arc surface is used for rolling cooperation with each second pushing shaft, so that the swinging member reciprocates around the axis of the first pushing shaft; an eccentric rotation mechanism, which has an input shaft for connecting with a power source and an output shaft eccentrically arranged with the input shaft; an output shaft through hole is provided on the swinging member, and the output shaft through hole is located between the inner arc surface and the outer arc surface. The output shaft of the eccentric rotation mechanism penetrates into the output shaft through hole to drive the swinging member to reciprocate.

2. The opposed reciprocating pump according to claim 1, It is characterized in that: a bearing bush is provided outside the first pushing shaft, and the inner arc surface of the swinging member presses against the bearing bush.

3. The opposed reciprocating pump according to claim 2, It is characterized in that: the first pushing shaft is rotatably assembled on the guiding mounting seat around its own axis.

4. The opposed reciprocating pump according to claim 1 or 2 or 3, It is characterized in that: the swinging member includes a swinging plate having the outer arc surface and a connecting rod having the inner arc surface, and the cross-sectional area of the connecting rod is smaller than the cross-sectional area of the swinging plate.

5. The opposed reciprocating pump according to claim 4, It is characterized in that: the guiding mounting seat includes two mounting seats arranged at intervals in the left-right direction, and further includes a fixing rod fixedly connecting the two mounting seats. The two mounting seats and the fixing rod cooperate to form the frame-type guiding mounting seat.

6. The opposed reciprocating pump according to claim 5, It is characterized in that: the fixing rods are arranged in a rectangular shape with four, and the fixing rods are provided with avoiding grooves for avoiding the swinging of the swinging plate.

7. The opposed reciprocating pump according to claim 1, It is characterized in that: the eccentric rotation mechanism is a crankshaft, the crankshaft includes a main journal and a connecting rod journal eccentrically arranged, the connecting rod journal forms the output shaft, and the connecting rod journal penetrates into the swinging member.

8. The opposed reciprocating pump according to claim 7, It is characterized in that: there are at least two groups of swinging members, and each swinging member is arranged at intervals in the front-back direction; The connecting rod journals correspond to the swinging members one by one; A crankshaft mounting seat is provided in the housing, and the crankshaft mounting seat is used to support the main journal between two adjacent connecting rod journals.

9. The opposed reciprocating pump according to claim 1 or 2 or 3, characterized in that: Connecting rods are fixedly provided at the left and right ends of the guiding mounting seat respectively, and the connecting rods are guidingly inserted through the housing so that the guiding mounting seat is guidingly assembled on the housing; The connecting rod is connected to the hydraulic end.

10. The opposed reciprocating pump according to claim 1 or 2 or 3, characterized in that: Two ear plates arranged at intervals up and down are respectively provided on the guiding mounting seat corresponding to the first thrust shaft and each second thrust shaft, and the corresponding ends of the swinging member are arranged in a limiting manner in the front-rear direction between the corresponding two ear plates.

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