Crosshead and crankshaft connecting rod mounting structure for slurry pump

Abstract

The utility model 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 shaft 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 mounting structure for a mud pump. Background Art

[0002] The mud pump is a piston or plunger type. The power machine drives the pump crankshaft 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 blocks 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 mounting 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 collision between the cylindrical pin and the pin hole on the crosshead, causing the cylindrical pin to wear, and finally affecting the positioning accuracy of the crosshead driving the piston to move, thus 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 shortcomings of the existing technology and provide a crosshead and crankshaft connecting rod installation structure for a mud pump, so as to solve 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] Provided is a crosshead and crankshaft connecting rod mounting structure for a mud pump, comprising

[0008] A crosshead, wherein a connecting cavity is provided in the crosshead, a socket is provided on the right side of the crosshead, and a front pin hole and a rear pin hole are respectively provided on the front and rear sides of the crosshead, wherein the socket, 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 defined in the connector and extends through the front and rear ends of the connector, a bearing is installed in the bearing cavity, and the connector is inserted into the connecting hole through the socket;

[0010] A connecting shaft, comprising a front shaft body, an intermediate shaft body, and a rear shaft body. The connecting shaft is inserted from the rear pin hole, passes through the bearing, and is inserted into the front pin hole. The front shaft body and the rear shaft body are both cones, and the intermediate shaft body is a cylinder. The front shaft body cooperates with the front pin hole, and the rear shaft body cooperates with the rear pin hole. 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 together by using 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, an inlet of the oil injection channel is provided in the baffle, 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 provided 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, in which the connecting shaft cooperates with the front pin hole and the rear pin hole on the crosshead through the front shaft body and the rear shaft body of the cone structure, thereby reducing the radial clearance between the connecting shaft and the crosshead, reducing the wear between the connecting shaft and the crosshead, having high installation accuracy and fast installation, improving the 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 will be further described below with reference to the accompanying drawings.

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

[0021] Figure 3 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 axle body, 42. Intermediate axle body, 43. Rear axle body;

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

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

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0028] This application provides a crosshead and crankshaft connecting rod mounting structure for a mud pump, which is described in detail below. It should be noted that the order in which the following embodiments are described does not limit the preferred order of the embodiments of this application. Furthermore, the descriptions of each embodiment in the following embodiments have their own specific focus. For details not provided in one embodiment, please refer to the relevant descriptions of other embodiments.

[0029] To solve the technical problem in the prior art that the crosshead 3 and crankshaft connecting rod mounting structure 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 mounting 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 socket is provided on the right side of the crosshead 3, and a front pin hole and a rear pin hole are respectively provided on the front and rear sides of the crosshead 3, wherein the socket, 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 is provided in the connector 11 and extends from front to back, wherein a bearing 2 is installed in the bearing cavity, and the connector 11 is inserted into the connecting hole through a socket;

[0033] Connecting shaft 4, such as Figure 3 As shown, the connecting shaft 4 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 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, 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 5 is connected to the rear end of the crosshead 3 and limits the connecting shaft 4 in the pin hole.

[0035] Specifically, as an optional implementation in this embodiment, the baffle 5 is fastened to the crosshead 3 using a plurality of bolts, which facilitate the assembly and disassembly of the baffle 5.

[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 the crosshead 3, and the other end abuts 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 5 are both provided with an oil injection channel 6 , the inlet of the oil injection channel 6 is provided on the baffle 5 , and the outlet of the oil injection channel 6 is connected to the bearing cavity.

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

[0040] Specifically, as an optional implementation in this embodiment, the crosshead 3 is connected to the intermediate pull rod 7 , and the intermediate pull 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 crankshaft connecting rod 1 drives the crosshead 3 to move horizontally on the guide plate, 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 install the bearing 2 into the bearing cavity of the crankshaft connecting rod 1, then insert the connecting head 11 of the crankshaft connecting rod 1 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 install the baffle 5 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 those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0045] In the description of the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on 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," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0047] In the several embodiments provided in this 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 merely a logical function division. There may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed may be through some communication interface, indirect coupling or communication connection of devices or units, which may be electrical, mechanical or other forms.

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

[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] With the above-described preferred embodiments of the present invention as a guide, and with reference to the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the contents of the specification and 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 socket 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 socket, the front pin hole, and the rear pin hole are all communicated with the connecting cavity, and the front pin hole and the rear pin hole are both tapered holes; A crankshaft connecting rod (1), wherein a connector (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 connector (11), a bearing (2) is installed in the bearing cavity, and the connector (11) is inserted into the connecting hole through the insertion hole; A connecting shaft (4), the connecting shaft (4) comprising 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) is matched with the front pin hole; the rear shaft body (43) is matched 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 limits 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, characterized in that: The baffle and the crosshead (3) are fastened together 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, wherein: An oil injection channel is provided in both the connecting shaft (4) and the baffle, an inlet of the oil injection channel is provided in the baffle, and an 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, wherein: The crosshead (3) is connected to an intermediate pull rod (7), and a fender (71) and a stuffing box (72) are provided on the intermediate pull rod (7).

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