A4VSO series novel detachable wear-resistant variable device

Abstract

The utility model discloses an A4VSO series novel detachable wear-resistant variable displacement device which comprises a wear-resistant device, the wear-resistant device is arranged in an A4VSO series variable displacement piston pump, and the wear-resistant device comprises a wear-resistant copper ring and a clamp spring. The wear-resistant copper ring is arranged on a variable rod of the A4VSO series variable plunger pump, the wear-resistant copper ring is fixed on the variable rod of the A4VSO series variable plunger pump through a snap spring, and five pressure equalizing grooves are formed in the outer side surface of the wear-resistant copper ring. The wear-resistant copper ring can be replaced by a new wear-resistant copper ring after being worn. Compared with the prior art, the side cover of the A4VSO series variable plunger pump is not provided with a pressure equalizing groove, and the wear-resistant copper ring is arranged between the variable rod and the side cover, so that the friction between the variable rod and the side cover is reduced, the pressure equalizing groove in the side cover is omitted, the production and processing cost of the side cover is reduced, the wear-resistant copper ring can be replaced after long-time use, and the cost is reduced. And the leakproofness of the inner cavity of the plunger pump is ensured.

Description

Technical Field

[0001] The utility model relates to an A4VSO series novel detachable wear-resistant variable displacement device, belonging to the technical field of A4VSO series variable displacement plunger pumps. Background Art

[0002] like Figure 1 As shown, the side covers at both ends of the existing A4VSO series variable piston pump cooperate with the variable rod, wherein a certain number of pressure equalizing grooves are provided on the inner ring of the side cover. There is a certain error between the side cover and the variable rod of the A4VSO series variable piston pump. After long-term use, there will be a certain amount of wear between the side cover and the variable rod. When subjected to forces in other directions, a greater pressure will be generated on one side of the variable rod and the side cover, accelerating wear and reducing service life. When a certain amount of wear occurs on the inner wall of the side cover of the variable piston pump, a gap will be generated between the side cover and the variable rod, resulting in oil leakage in the inner cavity so that the working pressure does not meet the requirements. In addition, after damage, the side cover of the plunger pump is not easy to process and repair, and the processing is difficult. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a new type of detachable wear-resistant variable displacement device of A4VSO series, which solves the problems that the side cover of the A4VSO series variable displacement plunger pump is easy to wear and the inner cavity of the side cover is difficult to process after long-term use.

[0004] The technical problem to be solved by the utility model is achieved by adopting the following technical solutions: a new type of detachable wear-resistant variable device of A4VSO series, including

[0005] Wear-resistant device, which is arranged inside the A4VSO series variable piston pump.

[0006] The wear-resistant device comprises a wear-resistant copper ring and a retaining ring. The wear-resistant copper ring is arranged on a variable rod of an A4VSO series variable piston pump. The wear-resistant copper ring is fixed on the variable rod of the A4VSO series variable piston pump through the retaining ring.

[0007] Preferably, at least one pressure equalizing groove is provided on the outer surface of the wear-resistant copper ring.

[0008] Preferably, the number of the pressure equalizing tanks is 5.

[0009] Preferably, when leakage occurs between the wear-resistant copper ring and the A4VSO series variable piston pump, a new wear-resistant copper ring can be replaced.

[0010] Preferably, the pressure equalizing groove provided on the side cover of the A4VSO series variable piston pump is cancelled.

[0011] Preferably, the wear-resistant copper ring is arranged at the connection between the variable rod of the A4VSO series variable piston pump and the side cover of the A4VSO series variable piston pump.

[0012] The beneficial effects of the utility model are:

[0013] (1) According to the utility model, a wear-resistant copper ring is provided at the mating position of the variable rod of the A4VSO series variable piston pump and the side cover of the A4VSO series variable piston, which can reduce the wear between the variable rod and the side cover, and ensure that the side cover and the variable rod do not cause significant wear due to wear during long-term use.

[0014] (2) Through the utility model, the pressure equalizing groove provided on the side cover of the A4VSO series variable piston pump is eliminated, and a pressure equalizing groove is provided on the outer side of the wear-resistant copper ring to ensure the airtightness of the inner cavity of the piston pump, reduce the difficulty of side cover processing, and reduce production costs.

[0015] (3) According to the utility model, the wear-resistant copper ring is fixed on the variable rod by the retaining spring. After long-term use, when the wear degree of the wear-resistant copper ring affects the use effect of the plunger pump, the wear-resistant copper ring can be replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the structural diagram of the existing A4VSO series variable piston pump

[0017] Figure 2 This is a schematic diagram of the structure of the utility model

[0018] Figure 3 This is a structural diagram of one side of the utility model

[0019] In the figure: 1- wear-resistant copper ring, 2- retaining ring, 3- side cover, 4- variable rod DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below in conjunction with specific embodiments.

[0021] Example 1

[0022] like Figure 1 As shown, in the prior art, the side cover of the A4VSO series variable piston pump is provided with a pressure equalizing groove on its inner cavity surface, and the airtightness of the inner cavity is ensured by the cooperation between the side cover and the variable rod. After long-term use, when the inner wall of the side cover of the variable piston pump produces a certain amount of wear, a gap is formed between the side cover and the variable rod, resulting in oil leakage in the inner cavity, so that the working pressure cannot meet the requirements, and the side cover is difficult to repair and the repair cost is high.

[0023] like Figure 2-Figure 3As shown, a new type of A4VSO series detachable wear-resistant variable device includes a wear-resistant device, which is composed of a wear-resistant copper ring 1 and a retaining spring 2. The wear-resistant copper ring 1 is set on the variable rod 4, and the retaining spring 2 limits the position of the wear-resistant copper ring 1 on the variable rod 4.

[0024] In a new type of detachable wear-resistant variable device of the A4VSO series, the inner cavity of the side cover 3 cancels the pressure equalizing groove and is adjusted to a groove, and the diameter of the groove is slightly wider than the variable rod 4, and the side cover 3 does not contact the variable rod 4. A wear-resistant copper ring 1 is provided on the variable rod 4 extending into the inner cavity of the side cover 3, and the wear-resistant copper ring 1 is fixed to the variable rod 4 by a retaining ring 2. The wear-resistant copper ring 1 can be removed and replaced with a new wear-resistant copper ring 1.

[0025] The wear-resistant copper ring 1 is in the shape of a hollow cylinder, and its inner diameter is the same as the outer diameter of the variable rod 4 extending into the inner cavity of the side cover 3, and the outer diameter of the wear-resistant copper ring 1 is the same as the inner cavity diameter of the side cover 3. At least one equalizing pressure groove is provided on the outer side of the wear-resistant copper ring 1. In this embodiment, five equalizing pressure grooves are provided on the outer side of the wear-resistant copper ring 1. The wear-resistant copper ring 1 can balance the pressure on both sides of the plunger by providing the equalizing pressure groove, thereby avoiding the clamping phenomenon between the side cover 3 and the wear-resistant copper ring 1.

[0026] The material of the wear-resistant copper ring 1 is: C63200, using American standard aluminum bronze, and the implementation standard is: ASTM B150 / B150M-2012.

[0027] The working principle of the utility model is as follows:

[0028] The utility model cancels the pressure-equalizing groove on the side cover of the A4VSO series variable piston pump, and there is no direct contact between the side cover 3 and the variable rod 4; and a wear-resistant copper ring 1 is arranged on the variable rod 4 extending into the inner cavity of the side cover 3, and a retaining spring 2 is arranged on the top of the wear-resistant copper ring 1 to limit the position of the wear-resistant copper ring 1 on the variable rod 4; a pressure-equalizing groove is arranged on the outer side of the wear-resistant copper ring 1, which can ensure the airtightness between the side cover 3 and the wear-resistant copper ring 1.

[0029] When the A4VSO series variable piston pump is working, the side cover 3 is in sliding contact with the wear-resistant copper ring 1, and the main wear is concentrated on the outside of the wear-resistant copper ring 1. After long-term use, the diameter of the wear-resistant copper ring 1 becomes shorter, and the fit between the wear-resistant copper ring 1 and the side cover 3 is not tight. At this time, the worn wear-resistant copper ring 1 can be removed and replaced with an unworn wear-resistant copper ring 1. The inner layer of the side cover 3 will also produce a certain amount of wear, but there is no need to re-set the pressure equalization groove, which greatly reduces the cost and difficulty of repairing the side cover 3.

[0030] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited to the above embodiments. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of protection claimed by the utility model. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A new type of detachable wear-resistant variable device of A4VSO series, including Wear-resistant device, which is arranged inside the A4VSO series variable piston pump. Features: The wear-resistant device comprises a wear-resistant copper ring and a retaining ring. The wear-resistant copper ring is arranged on a variable rod of an A4VSO series variable piston pump. The wear-resistant copper ring is fixed on the variable rod of the A4VSO series variable piston pump through the retaining ring.

2. A new type of detachable wear-resistant variable displacement device of A4VSO series according to claim 1, characterized in that: The outer surface of the wear-resistant copper ring is provided with at least one pressure equalizing groove.

3. A new type of detachable wear-resistant variable displacement device of A4VSO series according to claim 2, characterized in that: The number of the pressure equalizing tanks is 5.

4. A new type of detachable wear-resistant variable displacement device of A4VSO series according to claim 1, characterized in that: When leakage occurs between the wear-resistant copper ring and the A4VSO series variable piston pump, a new wear-resistant copper ring can be replaced.

5. According to claim 1, the A4VSO series new type detachable wear-resistant variable displacement device is characterized by: The pressure equalizing groove on the side cover of the A4VSO series variable piston pump has been cancelled.

6. A new type of detachable wear-resistant variable displacement device of A4VSO series according to claim 1, characterized in that: The wear-resistant copper ring is arranged at the connection between the variable rod of the A4VSO series variable piston pump and the side cover of the A4VSO series variable piston pump.

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