Hydraulic large pump for mine

Abstract

The utility model belongs to hydraulic big pump technical field discloses a kind of hydraulic big pump for mine, including composite pump body and main shaft, one end of composite pump body is detachably installed with pump cover by fastener, composite pump body is formed by dovetail groove interlocking with outer metal and inner lining plastic;Pump cover and main shaft between are equipped with three-stage floating sealing mechanism, three-stage floating sealing mechanism sequentially includes graphite-metal laminated, hydraulic compensation ring and labyrinth reflux groove ring, hydraulic compensation ring realizes radial pressure self-adaption by the micro spring of along the circumferential uniform distribution of hydraulic compensation ring, and composite pump body and pump cover are all equipped with several fixed holes;Fastener includes the link rod of being installed on fixed hole, link rod penetrates pump cover, and the projecting part is sleeved with fastening pad and thread cooperation connection has fastening cap, fastening pad is between fastening cap and pump cover.The utility model not only can improve the sealing performance of main shaft, but also can improve the corrosion resistance of pump body.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic pump technology, and in particular to a hydraulic pump for use in mining. Background Technology

[0002] Large hydraulic pumps for mining are a key piece of equipment in the mining industry. They are mainly used to provide high-pressure, high-flow hydraulic power to meet the high-intensity requirements of mining, transportation and operations. Their core function is to convert mechanical energy into hydraulic energy and drive various heavy machinery (such as hydraulic supports, rock drills, excavators, etc.) through the hydraulic system to complete tasks such as ore crushing, material conveying and equipment support.

[0003] Traditional mining hydraulic pumps mostly use direct-drive motors or gear drives, which have the following drawbacks: 1) Shaft seals are prone to failure under high pressure conditions, leading to increased leakage rate; 2) Existing pump bodies are mostly made of cast iron, which is easily corroded in acidic mine water. Therefore, we propose a large hydraulic pump for mining. Utility Model Content

[0004] In view of the problems mentioned above with existing mining hydraulic pumps, such as easy failure of shaft seals under high pressure conditions, increased leakage rate, and the fact that existing pump bodies are mostly made of cast iron, which is prone to corrosion in acidic mine water, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide a hydraulic pump for mining, which aims to improve the sealing performance of the main shaft and the corrosion resistance of the pump body by setting a three-stage floating sealing mechanism and a composite pump body.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A hydraulic pump for mining includes a composite pump body and a main shaft. One end of the composite pump body is detachably fitted with a pump cover by fasteners. The composite pump body is formed by interlocking an outer metal layer and an inner plastic liner through a dovetail groove. A three-stage floating sealing mechanism is provided between the pump cover and the main shaft. The three-stage floating sealing mechanism includes a graphite-metal stack, a hydraulic compensation ring, and a labyrinthine reflux groove ring in sequence. The hydraulic compensation ring achieves radial pressure self-adaptation through micro springs evenly distributed along the circumference of the hydraulic compensation ring.

[0007] As a technical solution for a hydraulic pump for mining according to the present utility model, the composite pump body and the pump cover are provided with several fixing holes; The fastener includes a connecting rod installed on the fixing hole, the connecting rod passing through the pump cover, and a fastening washer and a fastening cap threadedly connected to the protruding part, the fastening washer being located between the fastening cap and the pump cover.

[0008] As a technical solution for a hydraulic pump for mining operations according to this utility model, both ends of the connecting rod are provided with external threads that engage with the fixing hole and the fastening cap.

[0009] As a technical solution for a hydraulic pump for mining operations according to this utility model, the outer metal layer is Q345B steel plate, and the inner plastic lining is glass fiber.

[0010] As a technical solution for a hydraulic pump for mining operations according to this utility model, the graphite-metal laminate comprises alternating layers of thick graphite foil and stainless steel mesh.

[0011] As a technical solution for a hydraulic pump for mining operations according to this utility model, the labyrinthine reflux groove ring is provided with a six-headed reverse spiral groove, and the end of the groove is provided with a reflux hole. The reflux hole is inclined at an angle and points towards the oil tank.

[0012] Compared with the prior art, the present invention has at least the following beneficial effects: 1. This utility model improves the sealing performance of the spindle by setting a three-stage floating sealing mechanism, using graphite-metal laminate to compensate for axial wear, a hydraulic compensation ring to adapt to radial clearance, and a labyrinth-type return groove ring to force the circuit to form a negative pressure barrier.

[0013] 2. This utility model, by setting up a composite pump body and using a dovetail groove to interlock the outer metal layer and the inner plastic lining, can block the electrolyte channel, thereby improving the corrosion resistance of the pump body. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them: Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] Figure 2 For the present utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0016] Figure 3 This is a schematic diagram of the exploded structure of this utility model.

[0017] Figure 4 For the present utility model Figure 3 Enlarged structural diagram at point B.

[0018] Explanation of reference numerals in the attached figures: In the figure: 1. Composite pump body; 101. Fixing hole; 102. Inner plastic liner; 2. Pump cover; 3. Main shaft; 4. Connecting rod; 401. External thread; 5. Fastening pad; 6. Fastening cap; 701. Graphite-metal laminate; 702. Hydraulic compensation ring; 703. Labyrinth reflux groove ring. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0021] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0022] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0023] Reference Figures 1-4A hydraulic pump for mining applications is provided. This pump includes a composite pump body 1 and a main shaft 3. A pump cover 2 is detachably mounted on one end of the composite pump body 1 via fasteners. Both the composite pump body 1 and the pump cover 2 have several fixing holes 101. The fasteners include connecting rods 4 mounted on the fixing holes 101. The connecting rods 4 penetrate the pump cover 2, and a fastening washer 5 and a threaded fastening cap 6 are fitted onto the protruding portion. The fastening washer 5 is located between the fastening cap 6 and the pump cover 2. Both ends of the connecting rod 4 are threaded to the fixing holes 101 and the fastening cap 6. The external thread 401 of the connection, the composite pump body 1 is formed by interlocking the outer metal and the inner plastic lining 102 through the dovetail groove. The outer metal is Q345B steel plate with a thickness of 12mm, which is heat treated to HB280-320. The inner plastic lining 102 is glass fiber with a thickness of 8mm. The dovetail groove is 6mm deep, with an inclination angle of 45° and a spacing of 25mm between adjacent grooves. During injection molding, it is pressurized to 15MPa at 180℃ and held for 30 minutes. Its anti-detachment structure is that stainless steel pins with a diameter of 8mm are set every 200mm to penetrate the two layers of material. A three-stage floating sealing mechanism is provided between the pump cover 2 and the main shaft 3. The three-stage floating sealing mechanism includes, in sequence, a graphite-metal laminate 701, which consists of alternating layers of 0.2mm thick graphite foil and 0.1mm stainless steel mesh, totaling 12 layers. The preload is maintained by a wave spring with an initial compression of 1.5mm. The hydraulic compensation ring 702 is made of SiC ceramic ring with an inner diameter tolerance of H6 / g5. The hydraulic compensation ring 702 achieves radial pressure self-adaptation through micro springs evenly distributed along its circumference. The diameter of the micro springs is 1. 2mm, wire diameter 0.15mm, effective number of turns 8, pre-compression force 0.8N / each, total compensation ±0.5mm, labyrinth-type reflux groove ring 703, the labyrinth-type reflux groove ring 703 has a six-head reverse spiral groove, groove depth 0.3mm, lead 120mm, and a reflux hole with a diameter of 3mm at the end of the groove. The reflux hole is set at an inclination of 30° and points towards the oil tank. In application, the graphite-metal laminate 701 seals and compensates for axial wear, the hydraulic compensation ring 702 adapts to radial clearance, and the labyrinth-type reflux groove ring 703 forces the loop to form a negative pressure barrier to improve the sealing performance of the spindle 3.

[0024] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A hydraulic pump for use in mines, characterized in that: It includes a composite pump body (1), an inner plastic liner (102) and a main shaft (3). One end of the composite pump body (1) is detachably fitted with a pump cover (2) by fasteners. The composite pump body (1) is formed by interlocking the outer metal layer and the inner plastic liner (102) through a dovetail groove. A three-stage floating sealing mechanism is provided between the pump cover (2) and the main shaft (3). The three-stage floating sealing mechanism includes a graphite-metal stack (701), a hydraulic compensation ring (702), and a labyrinth-type reflux groove ring (703) in sequence. The hydraulic compensation ring (702) achieves radial pressure self-adaptation through micro springs evenly distributed along the circumference of the hydraulic compensation ring (702).

2. The hydraulic pump for mining operations according to claim 1, characterized in that: Both the composite pump body (1) and the pump cover (2) are provided with several fixing holes (101). The fastener includes a connecting rod (4) installed on the fixing hole (101), the connecting rod (4) passing through the pump cover (2), and a fastening pad (5) sleeved on the protruding part and a fastening cap (6) threadedly connected thereto, the fastening pad (5) being located between the fastening cap (6) and the pump cover (2).

3. The hydraulic pump for mining operations according to claim 2, characterized in that: Both ends of the connecting rod (4) are provided with external threads (401) that are threadedly connected to the fixing hole (101) and the fastening cap (6).

4. The hydraulic pump for mining operations according to claim 1, characterized in that: The outer metal layer is Q345B steel plate, and the inner plastic lining (102) is glass fiber.

5. The hydraulic pump for mining operations according to claim 1, characterized in that: The graphite-metal stack (701) comprises alternating layers of thick graphite foil and stainless steel mesh.

6. The hydraulic pump for mining operations according to claim 5, characterized in that: The labyrinth-type reflux groove ring (703) is provided with a six-headed reverse spiral groove, and the end of the groove is provided with a reflux hole. The reflux hole is set at an inclination of 30° and points towards the oil tank.

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