Crosshead and crankshaft connecting rod mounting structure for slurry pump

Abstract

The invention relates to a crosshead and crankshaft connecting rod mounting structure for a slurry pump. The crosshead and crankshaft connecting rod mounting structure comprises a crosshead, a connecting head is formed at the left end of the crankshaft connecting rod; the connecting pin comprises a front shaft body, a middle shaft body and a rear shaft body, the front shaft body is matched with the front pin hole, the rear shaft body is matched with the rear pin hole, the large-diameter end of the front shaft body is connected with the front end of the middle shaft body, and the rear end of the middle shaft body is connected with the small-diameter end of the rear shaft body; and the baffle is connected to the rear end of the crosshead, and the baffle limits the connecting shaft in the pin hole. The radial gap between the connecting shaft and the crosshead is reduced, abrasion between the connecting shaft and the crosshead is reduced, the installation precision is high, installation is rapid, the stability between the crosshead and the crankshaft connecting rod is improved, and the service life of the whole slurry pump is prolonged.

Description

Technical Field

[0001] The invention relates to the field of mud pumps, and in particular to a crosshead and crankshaft connecting rod installation structure for a mud pump. Background Art

[0002] The mud pump is piston or plunger type. The power machine drives the crankshaft of the pump to rotate, and the crankshaft drives the piston or plunger to reciprocate in the pump cylinder through the crosshead. Under the alternating action of the suction and discharge valves, the purpose of pressurizing and circulating the flushing liquid is achieved.

[0003] The crosshead and the crankshaft are connected by a crankshaft connecting rod. In the past, the installation structure between the crankshaft connecting rod and the crosshead was mainly to insert the crankshaft connecting rod into the crosshead, and then directly pass a cylindrical pin through the crankshaft connecting rod and the crosshead at the same time, and then clamp the limit baffles at both ends of the cylindrical pin to limit the axial movement of the cylindrical pin.

[0004] In the past, the technical problem with the installation structure between the crankshaft connecting rod and the crosshead was that there was a radial gap between the cylindrical pin and the crosshead. When the crankshaft connecting rod pulled the crosshead to move back and forth, there would be a collision between the cylindrical pin and the pin hole on the crosshead, causing the cylindrical pin to wear, and finally affecting the position accuracy of the crosshead driving the piston to move, affecting the service life of the mud pump. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a crosshead and crankshaft connecting rod installation structure for a mud pump, thereby solving the technical problem that the previous crosshead and crankshaft connecting rod installation structure is unstable and unreliable, which affects the service life of the mud pump.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] A crosshead and crankshaft connecting rod mounting structure for a mud pump is provided, comprising:

[0008] A crosshead, wherein a connecting cavity is provided in the crosshead, a plug hole is provided on the right side of the crosshead, and a front pin hole and a rear pin hole are provided on the front and rear sides of the crosshead respectively, the plug hole, the front pin hole and the rear pin hole are all connected to the connecting cavity, and the front pin hole and the rear pin hole are both tapered holes;

[0009] A crankshaft connecting rod, wherein the left end of the crankshaft connecting rod forms a connector, a bearing cavity is provided in the connector and runs through the front and rear, a bearing is installed in the bearing cavity, and the connector is inserted into the connecting hole through the insertion hole;

[0010] A connecting shaft, wherein the connecting pin comprises a front shaft body, an intermediate shaft body and a rear shaft body, wherein the connecting shaft is inserted from the rear pin hole and inserted into the front pin hole after passing through the bearing, wherein the front shaft body and the rear shaft body are both cones, wherein the intermediate shaft body is a cylinder, wherein the front shaft body cooperates with the front pin hole, and the rear shaft body cooperates with the rear pin hole, wherein the large-diameter end of the front shaft body is connected to the front end of the intermediate shaft body, and the rear end of the intermediate shaft body is connected to the small-diameter end of the rear shaft body;

[0011] A baffle is connected to the rear end of the crosshead and limits the connecting shaft in the pin hole.

[0012] Furthermore, the baffle and the crosshead are fastened and connected by a plurality of bolts.

[0013] Furthermore, a step is formed between the rear axle body and the intermediate axle body.

[0014] Furthermore, an oil injection channel is provided in both the connecting shaft and the baffle plate, an inlet of the oil injection channel is provided in the baffle plate, and an outlet of the oil injection channel is connected to the bearing cavity.

[0015] Furthermore, the crosshead is connected to an intermediate pull rod, and a fender and a stuffing box are arranged on the intermediate pull rod.

[0016] The beneficial effects of the present invention are:

[0017] The present invention provides a crosshead and crankshaft connecting rod installation structure for a mud pump, wherein a connecting shaft cooperates with a front pin hole and a rear pin hole on the crosshead through a front shaft body and a rear shaft body of a cone structure, thereby reducing a radial clearance between the connecting shaft and the crosshead, reducing wear between the connecting shaft and the crosshead, having high installation accuracy and quick installation, improving stability between the crosshead and the crankshaft connecting rod, and extending the service life of the entire mud pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below in conjunction with the accompanying drawings.

[0019] Figure 1 It is a transverse half-section view of the installation structure of the crosshead and crankshaft connecting rod for the mud pump of the present invention;

[0020] Figure 2 It is a vertical half-section view of the crosshead and crankshaft connecting rod mounting structure for a mud pump of the present invention;

[0021] Figure 3 It is a schematic diagram of the connecting shaft;

[0022] Among them, 1. crankshaft connecting rod, 11. connector;

[0023] 2. Bearing; 3. Crosshead;

[0024] 4. connecting shaft, 41. front shaft body, 42. intermediate shaft body, 43. rear shaft body;

[0025] 5. Baffle, 6. Oil filling channel;

[0026] 7. Intermediate tie rod, 71. Fender, 72. Stuffing box. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] The present application provides a crosshead and crankshaft connecting rod mounting structure for a mud pump, which are described in detail below. It should be noted that the description order of the following embodiments does not limit the preferred order of the embodiments of the present application. In the following embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0029] In order to solve the technical problem that the crosshead 3 and crankshaft connecting rod installation structure in the prior art is unstable and unreliable, which affects the service life of the mud pump, an embodiment of the present application provides a crosshead and crankshaft connecting rod installation structure for a mud pump, which is described in detail below.

[0030] like Figure 1 and Figure 2 As shown, a crosshead and crankshaft connecting rod mounting structure for a mud pump includes:

[0031] A crosshead 3, wherein a connecting cavity is provided in the crosshead 3, a plug hole is provided on the right side of the crosshead 3, and a front pin hole and a rear pin hole are provided on the front and rear sides of the crosshead 3 respectively, wherein the plug hole, the front pin hole and the rear pin hole are all connected to the connecting cavity, and the front pin hole and the rear pin hole are both tapered holes;

[0032] A crankshaft connecting rod 1, wherein a connector 11 is formed at the left end of the crankshaft connecting rod 1, wherein a bearing cavity extending from front to back is provided in the connector 11, wherein a bearing 2 is installed in the bearing cavity, and wherein the connector 11 is inserted into the connecting hole through a plug hole;

[0033] Connecting shaft 4, such as Figure 3 As shown, the connecting pin includes a front shaft body 41, an intermediate shaft body 42 and a rear shaft body 43. The connecting shaft 4 is inserted from the rear pin hole and inserted into the front pin hole after passing through the bearing 2. The front shaft body 41 and the rear shaft body 43 are both cones, and the intermediate shaft body 42 is a cylinder. The front shaft body 41 cooperates with the front pin hole, and the rear shaft body 43 cooperates with the rear pin hole. The large diameter end of the front shaft body 41 is connected to the front end of the intermediate shaft body 42, and the rear end of the intermediate shaft body 42 is connected to the small diameter end of the rear shaft body 43.

[0034] The baffle plate 5 is connected to the rear end of the crosshead 3, and the baffle plate 5 limits the connecting shaft 4 in the pin hole.

[0035] Specifically, as an optional implementation in this embodiment, the baffle plate 5 is fastened to the crosshead 3 by a plurality of bolts, so that the baffle plate 5 can be easily assembled and disassembled by the bolts.

[0036] Specifically, as an optional implementation in this embodiment, Figure 3 As shown, a step is formed between the rear axle body 43 and the intermediate axle body 42 .

[0037] The step is used to cooperate with the inner ring of the bearing 2. The lower end of the inner ring of the bearing 2 abuts against the crosshead 3, and the other end abuts against the step of the connecting shaft 4. When the connecting shaft 4 is installed in the crosshead 3, the connecting shaft 4 also limits the position of the bearing 2 in the connecting hole.

[0038] Specifically, as an optional implementation in this embodiment, Figure 2 As shown, the connecting shaft 4 and the baffle plate 5 are both provided with an oil injection channel 6, the inlet of the oil injection channel 6 is provided on the baffle plate 5, and the outlet of the oil injection channel 6 is connected to the bearing cavity.

[0039] The baffle plate 5 and the crosshead 3 are sealed to ensure the sealing of the oil injection channel 6 and prevent the lubricating oil from leaking from between the baffle plate 5 and the crosshead 3 .

[0040] Specifically, as an optional implementation in this embodiment, the crosshead 3 is connected to the intermediate tie rod 7 , and the intermediate tie rod 7 is provided with a fender 71 and a stuffing box 72 .

[0041] The mud guard 71 and the stuffing box 72 are used to prevent mud from entering the crosshead 3 .

[0042] The right end of the crankshaft connecting rod 1 is connected to the crankshaft in the mud pump, and the middle pull rod 7 is connected to the piston rod. During operation, the crankshaft rotates, and the crosshead 3 is driven to move horizontally on the guide plate through the crankshaft connecting rod 1, and the crosshead 3 then drives the piston rod to move back and forth through the middle pull rod 7.

[0043] The installation process of the crankshaft connecting rod 1 and the crosshead 3 is as follows: now the bearing 2 is installed in the bearing cavity of the crankshaft connecting rod 1, and then the connecting head 11 of the crankshaft connecting rod 1 is inserted into the crosshead 3 from the socket, and the connecting shaft 4 passes through the rear pin hole, the bearing 2 and the front pin hole in turn, and finally the baffle 5 is installed on the crosshead 3. The baffle 5 limits the axial movement of the connecting shaft 4, and a conical surface fit is formed between the front shaft body 41, the rear shaft body 43 and the crosshead 3, which limits the radial movement, improves the installation accuracy between the crankshaft connecting rod 1 and the crosshead 3, and realizes quick installation.

[0044] The various devices selected in this application (components whose specific structures are not described) are all universal standard parts or components known to technical personnel in this field, and their structures and principles can be known to technical personnel through technical manuals or through conventional experimental methods.

[0045] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0047] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0048] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0049] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0050] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A crosshead and crankshaft connecting rod mounting structure for a mud pump, characterized in that: include A crosshead (3), wherein a connecting cavity is provided in the crosshead (3), a plug hole is provided on the right side of the crosshead (3), and a front pin hole and a rear pin hole are provided on the front and rear sides of the crosshead (3), respectively, the plug hole, the front pin hole, and the rear pin hole are all connected to the connecting cavity, and the front pin hole and the rear pin hole are both tapered holes; A crankshaft connecting rod (1), wherein a connecting head (11) is formed at the left end of the crankshaft connecting rod (1), a bearing cavity extending from front to back is provided in the connecting head (11), a bearing (2) is installed in the bearing cavity, and the connecting head (11) is inserted into the connecting hole through the insertion hole; A connecting shaft (4), wherein the connecting pin comprises a front shaft body (41), an intermediate shaft body (42) and a rear shaft body (43); the connecting shaft (4) is inserted from the rear pin hole and passes through the bearing (2) and then inserted into the front pin hole; the front shaft body (41) and the rear shaft body (43) are both cones; the intermediate shaft body (42) is a cylinder; the front shaft body (41) cooperates with the front pin hole; the rear shaft body (43) cooperates with the rear pin hole; the large diameter end of the front shaft body (41) is connected to the front end of the intermediate shaft body (42); and the rear end of the intermediate shaft body (42) is connected to the small diameter end of the rear shaft body (43); A baffle is connected to the rear end of the crosshead (3), and the baffle restricts the connecting shaft (4) within the pin hole.

2. The crosshead and crankshaft connecting rod mounting structure for a mud pump according to claim 1 is characterized in that: The baffle plate and the crosshead (3) are fastened and connected by a plurality of bolts.

3. The crosshead and crankshaft connecting rod mounting structure for a mud pump according to claim 1 is characterized in that: A step is formed between the rear axle body (43) and the intermediate axle body (42).

4. The crosshead and crankshaft connecting rod mounting structure for a mud pump according to claim 2 is characterized in that: The connecting shaft (4) and the baffle plate are both provided with oil injection channels, the inlet of the oil injection channel is provided in the baffle plate, and the outlet of the oil injection channel is connected to the bearing cavity.

5. The crosshead and crankshaft connecting rod mounting structure for a mud pump according to claim 2, characterized in that: The crosshead (3) is connected to an intermediate pull rod (7), and a fender (71) and a stuffing box (72) are arranged on the intermediate pull rod (7).

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