新型双作用柱塞泵的设计与特性分析

林超; 魏艳群; 赵相路; 吴小勇

doi:10.3969/j.issn.0258-2724.2018.03.023

新型双作用柱塞泵的设计与特性分析

doi: 10.3969/j.issn.0258-2724.2018.03.023

基金项目:

国家自然科学基金资助项目 51275537

国家自然科学基金资助项目 51675060

详细信息

作者简介:
林超(1958-), 男, 教授, 博士, 研究方向为新型齿轮传动、机械设计计算机辅助工程、齿轮传动系统的设计分析与制造, E-mail:linchao@cqu.edu.cn

中图分类号: TH322
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出版历程
- 收稿日期: 2016-01-12
- 刊出日期: 2018-06-01

Design and Analysis of New Type of Piston Pump

摘要

摘要: 为改善斜盘式柱塞泵的脉动性能，基于啮合理论和几何学的相关知识，提出了由双端曲面齿轮作为转子、双作用柱塞不间断排油的新型双作用柱塞泵.利用端曲面齿轮副传动原理，建立了双端曲面齿轮啮合坐标系和柱塞运动坐标系，结合柱塞泵的工作特性，进行了柱塞结构的设计，探讨了新型柱塞泵的柱塞分布情况；运用新型双作用柱塞泵的工作原理，推导出了柱塞位移、速度及相应的瞬时流量方程，并分析了柱塞数、偏心率和端曲面齿轮阶数对流量脉动率的影响因素.分析结果表明：相较于现有的斜盘式柱塞泵，新型双作用柱塞泵流量脉动率的变化趋势更为平稳，且流量脉动率随着柱塞数量的增多，偏心率的减小，端曲面齿轮阶数的增大而降低；通过试验，得出柱塞运动速度的最大误差为4.79 mm/s.
- 斜盘式柱塞泵 /
- 端曲面齿轮 /
- 原理 /
- 运动学分析 /
- 流量特性
Abstract: To improve the pulsating performance of a swashplate piston pump, a new type of double-acting piston pump is designed based on the meshing theory and the related knowledge of geometry. The pump is driven by the double curve-face gear and its pistons drain oil uninterruptedly. By using the transmission principle of the curve-face gear pair, the engagement coordinates of the double curve-face gear and piston motion analysis coordinates were established. The piston structure was designed according to the working characteristics of the piston pump, and the piston distribution of a new type piston pump is discussed. The equations of piston displacement, velocity, and instantaneous flow were deduced based on the working principle of the proposed double-acting piston pump, and the factors affecting the flow pulsation rate, such as the number of plungers, eccentricity, and the order of curve-face gear, were analysed. The analysis results show that compared with the existing swashplate piston pump, the variation in the flow pulsation rate of the proposed double-acting piston pump is more stable, and the flow pulsation rate decreases with increase in the number of plungers, decrease in the eccentricity, and increase in the order of the curve-face gear. The test-bed was used to test the plunger velocity, and the maximum error value is 4.79 mm/s.were in good agreement with the theoretical values; the error was less than 5%, which is within the allowable range of error.
- swashplate piston pump /
- curve-face gear /
- theory /
- kinematic analysis /
- flow characteristics

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图 1 新型双作用柱塞泵结构

1:输入轴; 2:泵体; 3:右柱塞杆; 4:左柱塞杆; 5:连杆; 6:滚动齿轮; 7:双端曲面齿轮; 8:拉簧; 9:右腔; 10:左腔; 11:右腔吸油阀; 12:左腔吸油阀; 13:左腔排油阀; 14:右腔排油阀; 15:导向滑槽

Figure 1. Proposed double-acting piston pump structure

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图 2 双端曲面齿轮工作原理

Figure 2. Working principle of double curve-face gear

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图 3 端曲面齿轮副的空间啮合原理

Figure 3. Space engagement theory of curve-face gear pair

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图 4 新型双作用柱塞泵局部结构

Figure 4. Partial structural diagram of proposed double-acting piston pump

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图 5 柱塞分布机理

Figure 5. Distribution principle of pistons

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图 6 运动分析坐标系

Figure 6. Motion analysis coordinates

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图 7 柱塞数对流量脉动率的影响曲线

Figure 7. Influence of piston number on pump flow pulsation rates

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图 8 偏心率对流量脉动率的影响曲线

Figure 8. Influence of eccentricity on pump flow pulsation rates

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图 9 端曲面齿轮的阶数对流量脉动率的影响曲线

Figure 9. Impact of order of curve-face gear on flow pulsation rate

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图 10 试验平台

Figure 10. Test platform

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图 11 速度的理论值与实验值的对比

Figure 11. Comparison of theoretical and experimental velocities

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表 1 柱塞布局

Table 1. Arrangement of pistons

参数	柱塞布局	柱塞机构
n₁=1 n₂=3 u=η=3
n₁=2 n₂=2 u=η=4
n₁=1 n₂=5 u=η=5
n₁=2 n₂=3 u=η=6
n₁=1 n₂=7 u=η=7
n₁=2 n₂=4 u=η=8

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表 2 瞬时流量与柱塞速度的变化规律

Table 2. Variation of instantaneous flow and piston velocity

柱塞参数	柱塞速度	瞬时流量
n₁=2 n₂=3 u=6 η=3
n₁=2 n₂=3 u=6 η=4
n₁=2 n₂=3 u=6 η=5
n₁=2 n₂=3 u=6 η=6
n₁=2 n₂=3 u=6 η=7
n₁=2 n₂=3 u=6 η=8

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表 3 柱塞数对泵的流量脉动率的影响

Table 3. Influence of number of pistons on pump flow pulsation rates

%
泵的类型	η/个
泵的类型	2	3	4	5	6	7	8	9
新型双作用柱塞泵	40.0	22.2	16.5	13.3	12.2	12.5	11.8	10.5
斜盘式柱塞泵	45.0	15.9	35.3	8.0	15.9	6.5	13.0	5.0

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表 4 偏心率对流量脉动率的影响

Table 4. Influence of eccentricity on pump flow pulsation rates

%
k	η/个
k	2	3	4	5	6	7	8	9
0.1	40.0	22.2	16.5	13.3	12.2	12.5	11.8	10.5
0.2	45.5	31.4	24.9	24.7	21.5	22.9	21.7	21.5
0.3	50.9	41.0	35.0	34.0	31.0	31.5	30.2	30.0

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表 5 端曲面齿轮阶数对泵的流量脉动率的影响

Table 5. Relationship between piston pump flow pulsation rates and order of curve-face gear

%
n₂	η/个
n₂	2	3	4	5	6	7	8	9
1	125.0	132.0	117.0	123.0	121.0	120.0	122.0	121.0
2	69.5	71.6	63.0	63.7	61.1	61.4	60.2	60.0
3	40.0	22.2	16.5	13.3	12.2	12.5	11.8	10.5

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新型双作用柱塞泵的设计与特性分析

doi: 10.3969/j.issn.0258-2724.2018.03.023

作者简介: 林超(1958-), 男, 教授, 博士, 研究方向为新型齿轮传动、机械设计计算机辅助工程、齿轮传动系统的设计分析与制造, E-mail:linchao@cqu.edu.cn

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出版历程

Design and Analysis of New Type of Piston Pump

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出版历程

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作者简介:
林超(1958-), 男, 教授, 博士, 研究方向为新型齿轮传动、机械设计计算机辅助工程、齿轮传动系统的设计分析与制造, E-mail:linchao@cqu.edu.cn